cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.25493/t1n3-kcx
title: Deep texture features for surface-based characterization of fiber architecture in the human hippocampus (v1)

description: This dataset contains deep texture features characterizing architectonic patterns of the pyramidal layer in the hippocampal cornu Ammonis region and the subicular complex, as captured by three-dimensional polarized light imaging (3D-PLI).
The 3D-PLI measurements were obtained from 547 individual brain sections of the right hippocampus of an 87-year-old male. Texture features were extracted from 3D-PLI images using a width-reduced ResNet-50 encoder trained on a 3D-Context Contrastive Learning (CL-3D) objective. The features were aggregated along the full depth of the pyramidal layer and transformed into an unfolded coordinate space using HippUnfold. In addition, we provide projections of the feature vectors onto 52 principal components with largest explained variance. These components reflect the general regional organization and reveal an expected functional rostro-caudal heterogeneity of the pyramidal layer.
By transferring features to an unfolded coordinate system using HippUnfold, the data are placed in a canonical reference space, enabling comparisons with other unfolded datasets. Moreover, we provide unfolded surfaces for both the MNI ICBM 152 Nonlinear Asymmetric 2009c and the BigBrain histological space, allowing access to the features within these volumetric reference spaces as well.
DOI: 10.25493/9m27-aw3
title: The Human Connectome Project's Connectomics of Brain Aging and Dementia MEG Repository (1.0)

description: The Human Connectome Project's Connectomics of Brain Aging and Dementia (HCP-CoBrA) cohort is an NIH-funded initiative aimed at investigating the intricate interplay between brain structure and function across the Alzheimer's disease (AD) continuum ([Cohen et al., 2021](https://doi.org/10.3389/fnagi.2021.669490)). Here, we introduce the HCP-CoBrA MEG Repository, a subset of the HCP-CoBrA cohort specifically dedicated to the curation of MEG data. This repository provides a comprehensive dataset, in which MEG data are complemented by data from structural MRI, neuropsychological evaluations, and amyloid PET imaging. This dataset includes 114 participants spanning various stages of the AD continuum: 66 healthy controls (aged 50–89; 44 females), 13 individuals with subjective cognitive decline (aged 60–78; 6 females), 28 with mild cognitive impairment (aged 50–87; 22 females), and 7 diagnosed with AD (aged 52–79; 3 females). In addition, it incorporates 32 participants (aged 50–88; 17 females) ascribed to the newly introduced category of «impaired without cognitive complaints». This category represents individuals identified as cognitively impaired who lack personal awareness of such limitation. This dataset complies with the Brain Imaging Data Structure extension for MEG data and has undergone minimal processing to ensure identity protection and data reusability.
DOI: 10.25493/sb0f-g2d
title: The Complutense MEG Repository for the study of the Alzheimer's disease continuum (v1.0)

description: Alzheimer's disease (AD) is a pressing healthcare concern currently affecting 50 million people. AD is best conceptualized as a clinical continuum, with the preclinical stage potentially starting decades before the onset of the cognitive symptoms. The extended duration of this preclinical period underscores its critical role in research, creating a prolonged window of opportunity for exploring novel biomarkers and testing early interventions. *The Complutense MEG Repository for the study of the Alzheimer’s disease continuum* is a compilation of cross-sectional data collected to investigate the electrophysiological correlates of preclinical and prodromal AD. This dataset includes MEG, MRI, clinical, neuropsychological, and genetic data from 364 participants, encompassing 119 healthy controls (aged 60−80; 79 females), 88 participants with subjective cognitive decline (aged 62−82; 70 females), 142 participants with mild cognitive impairment (aged 57−87; 93 females), and 15 participants with AD (aged 63−83; 7 females). The MEG and MRI data have been minimally processed to ensure identity protection and data reusability. We trust that this data publication will serve to generate new insights into the neural mechanisms of the disease, for example, through the application of innovative methodologies for MEG data analysis.
DOI: 10.48577/jpl.ckksff
title: Seismic wave detectability on Venus using ground deformation sensors, infrasound sensors on balloons and airglow imagers

description: The relatively unconstrained internal structure of Venus is a missing piece in our 32 understanding of the Solar System formation and evolution. To determine the seismic 33 structure of Venus’ interior, the detection of seismic waves generated by venusquakes is 34 crucial, as recently shown by the new seismic and geodetic constraints on Mars’ interior 35 obtained by the InSight mission. In the next decades multiple missions will fly to Venus 36 to explore its tectonic and volcanic activity, but they will not be able to conclusively re- 37 port on seismicity or detect actual seismic waves. Looking towards the next fleet of Venus 38 missions in the future, various concepts to measure seismic waves have already been ex- 39 plored in the past decades. These detection methods include typical geophysical ground 40 sensors already deployed on Earth, the Moon, and Mars; pressure sensors on balloons; 41 and airglow imagers on orbiters to detect ground motion, the infrasound signals gener- 42 ated by seismic waves, and the corresponding airglow variations in the upper atmosphere. 43 Here, we provide a first comparison between the detection capabilities of these different 44 measurement techniques and recent estimates of Venus’ seismic activity. In addition, we 45 discuss the performance requirements and measurement durations required to detect seis- 46 mic waves with the various detection methods. As such, our study clearly presents the 47 advantages and limitations of the different seismic wave detection techniques and can 48 be used to drive the design of future mission concepts aiming to study the seismicity of 49 Venus.
DOI: 10.48577/jpl.meqstw
title: Euclid: The rb-M∗ relation as a function of redshift. I. The 5 × 109M⊙ black hole in NGC 1272⋆

description: Core ellipticals are the results of dry mergers. During these events a binary black hole is formed, destroying the original cuspy central regions of the merging objects and scatters stars that are not on tangential orbits. The size of the emerging core correlates with the mass of the finally merged black hole. In this work we report the first Euclid-based mass determination of a supermassive black hole. We perform it by studying the center of NGC 1272, the second most luminous elliptical galaxy in the Perseus cluster, combining the Euclid VIS photometry coming from the Early Release Observations of the Perseus cluster with VIRUS spectroscopic observations at the Hobby-Eberly Telescope. The core of NGC 1272 is detected on the Euclid VIS image of the Perseus cluster. Its size is 1. ′′29 ± 0. ′′07 or 0.45 kpc, determined by fitting PSF-convolved core-Sérsic and Nuker-law functions. We deproject the surface brightness profile of the galaxy, finding that the galaxy is axisymmetric and nearly spherical. The two-dimensional stellar kinematics of the galaxy is measured from the VIRUS spectra by deriving optimally regularized non-parametric line-of-sight velocity distributions. Dynamical models of the galaxy are constructed using our axisymmetric and triaxial Schwarzschild codes. We measure a black hole mass of (5 ± 3) × 109M⊙, in line with the expectation from the MBH-rb correlation, but eight times larger than predicted by the MBH-σ correlation. The core size, rather than the velocity dispersion, allows one to select galaxies harboring the most massive black holes. The spatial resolution, wide area coverage, and depth of the Euclid (Wide and Deep) surveys allow us to find cores of passive galaxies larger than 2 kpc up to redshift 1.Key words. Galaxies: kinematics and dynamics; elliptical and lenticular, cD; individual: NGC 1272; nuclei; photometry
DOI: 10.48577/jpl.ygs4lg
title: JWST ice band profiles reveal mixed ice compositions in the HH 48 NE disk

description: Planet formation is strongly influenced by the composition and distribution of volatiles within proto-planetary disks. With JWST, it is now possible to obtain direct observational constraints on disk ices, as recently demonstrated by the detection of ice absorption features towards the edge-on HH 48 NE disk as part of the Ice Age Early Release Science program. Here, we introduce a new radiative transfer modeling framework designed to retrieve the composition and mixing status of disk ices using their band profiles, and apply it to interpret the H2O, CO2, and CO ice bands observed towards the HH 48NE disk. We show that the ices are largely present as mixtures, with strong evidence for CO trapping in both H2O and CO2 ice. The HH 48 NE disk ice composition (pure vs. polar vs. apolar fractions) is markedly different from earlier protostellar stages, implying thermal and/or chemical reprocessing during the formation or evolution of the disk. We infer low ice-phase C/O ratios around 0.1 throughout the disk, and also demonstrate that the mixing and entrapment of disk ices can dramatically affect the radial dependence of the C/O ratio. It is therefore imperative that realistic disk ice compositions are considered when comparing planetary compositions with potential formation scenarios, which will fortunately be possible for an increasing number of disks with JWST.
DOI: 10.48577/jpl.1nvlxu
title: Debiasing astro-Photometric Observations with Corrections Using Statistics (DePhOCUS)

description: The photometry of optical observations of asteroids received and distributed by the Minor Planet Center (MPC), also known as astro-photometric observations, often serve as the only available basis for the derivation of physical properties such as the absolute magnitude, which is a proxy to infer the size of the observed object, and its albedo with thermal observations. Magnitude information is acquired in different color bands, with respect to reference star catalogs, and from different observatory sites. In order to combine measurements, photometry using different bands need to be converted to a common band, typically V-band. Current band correction schemes in use by IAU’s MPC, JPL’s Center for NEO Studies (CNEOS) and ESA’s NEO Coordination Centre (NEOCC) use average correction values for the apparent magnitude derived from photometry of asteroids. By analyzing the photometric residuals of asteroids, we refine the previous correction scheme and additionally debias the observations based on their catalog and observatory. We describe a new statistical photometry correction scheme for asteroid observations with debiased corrections. Testing this scheme on a reference group of asteroids, we see a 51% reduction in the photometric residuals. Moreover, the new scheme leads to a more accurate and debiased determination of the H-G magnitude system and, in turn, leading to a more reliable inferred size, which is highly needed for asteroid population models. We discuss the significant shift in the corrections with this "DePhOCUS" debiasing system, its limitations, and the impact for photometric and physical properties of all asteroids, especially near-Earth objects (NEOs).
DOI: 10.48577/jpl.xugmau
title: Fatty acid analysis by capillary electrophoresis and contactless conductivity detection for future life detection missions

description: Future life-detection missions will likely search for biosignatures within a wide range of organic compounds, including fatty acids. In order to determine such biosignatures it is necessary to identify and quantify individual fatty acids present within a sample. In this study, we present a method using capillary electrophoresis coupled to contactless conductivity detection (CE–C4D) for the separation and detection of both saturated and unsaturated fatty acids after derivatization with N,N-diethylethylenediamine, triethylamine, and 2-chloro-1-methylpyridinium iodide at 40°C for 10 min. Operating conditions (background electrolyte, separation voltage and temperature) were optimized to provide maximum separation of fatty acids, thereby allowing their identification and quantification. Using a background electrolyte of 2 M acetic acid in 45% acetonitrile, an optimal separation was obtained with a separation voltage of 10 kV and a capillary temperature of 15°C. The optimized CE–C4D method was used to analyze samples of the cyanobacterium Spirulina. Multiple fatty acids were detected in the samples, showing the potential of this method for detection of fatty acid biosignatures during future spaceflight missions.
DOI: 10.48577/jpl.jsvaqm
title: Euclid: Early Release Observations – High-precision imaging astrometry and photometry. I.⋆ Internal kinematics of NGC6397 by combining Euclid and Gaia data

description: The cameras at the focus of the Euclid space observatory offer superb, diffraction-limited imaging over an unprecedented (from space) wide field of view of ∼0.57 square degree. This exquisite image quality has the potential to produce high-precision astrometry for point sources once the severe undersampling of the Euclid’s cameras is opportunely taken into account for with accurate effective point spread function (ePSF) modelling. We present a complex, detailed workflow to simultaneously solve for the geometric distortion (GD) and model the undersampled ePSFs of the Euclid detectors. Our procedure was successfully developed and tested with data from the Early Release Observations (ERO) programme focused on the nearby globular cluster NGC 6397. Our final one-dimensional astrometric precision for a well-measured star just below saturation is 0.8 mas (0.008 pixel) for VIS and 3 mas (0.01 pixel) for NISP. Finally, we present a demonstrative and challenging scientific application: the combination of Euclid and Gaia data to compute proper motions and study the internal motions of NGC 6397. Future work, when more data will be available, will allow for a better characterization of the ePSFs and GD corrections that are derived here, along with assessing their temporal stability, and their dependencies on the spectral energy distribution of the sources as seen through the wide-band filters of Euclid. Key words. astrometry – photometry – proper motions – stellar clusters – globular clusters
DOI: 10.48577/jpl.rhiqad
title: Magnetospheric control of ionospheric TEC perturbations via whistler-mode and ULF waves

description: Total electron content (TEC) in the ionosphere is vital for space weather applications, including monitoring Global Navigation Satellite Systems (GNSS) scintillations and detecting natural hazards, making comprehensive understanding, modeling, and forecasting of TEC perturbations critical for modern society. While modulations of TEC perturbations (dTEC) in the auroral region have been observed to be associated with ultra low-frequency (ULF) waves, their driving mechanisms remain unclear. Using fortuitously timed and positioned conjugate observations from the THEMIS spacecraft and a GPS receiver at Fairbanks, Alaska, we provide direct evidence that dTEC modulations are driven by magnetospheric precipitation due to electron scattering into the loss cone by ULF-modulated whistler-mode waves. Peak-to-peak dTEC amplitudes reached ∼0.5 TECU with modulations spanning scales of ∼5–80 km. The cross-correlation between modeled and observed dTEC reached ∼0.8 during the conjugacy period but decreased outside of it. The amplitude spectra of whistler-mode waves and dTEC also matched closely from 1 mHz to tens of mHz during the conjugacy period but diverged outside of it. Our findings offer crucial insights that could improve physics-based TEC modeling and ultimately enhance TEC forecast capabilities.
DOI: 10.48577/jpl.edlyiq
title: The effect of p-doping in mid and long wavelength InAs/InAsSb superlattice complementary barrier infrared detectors

description: We compare mid-wavelength InAs/InAsSb superlattice complementary barrier infrared detectors (CBIRDs) with n-type and p-type absorbers, and also report results on a series of five long-wavelength CBIRD samples that have the same structure but with a systematic variation in the absorber doping profile. Our studies show that devices containing p-type absorber layers can take advantage of the longer electron diffusion length for enhanced quantum efficiency (QE) compared to those that use only n-type absorbers, while the dark current performance is better for devices that use only n-type absorbers. Under typical operating conditions, the use of p-type absorbers manifests in higher bulk and surface generation-recombination (G-R) dark current in mid-wavelength detectors, and in higher trap-assisted tunneling dark current in long-wavelength detectors. The QE/dark current tradeoff is observed in both mid- and long-wavelength detectors, but is less pronounced in the mid-wavelength devices.
DOI: 10.21227/2hqp-7w24
title: Magnetic Hyperthermia Dataset

description: Hyperthermia exposes tumor to a high temperature to kill cancer cells. By locally heating the tumor site, this method achieves a less invasive treatment with minimum side effects compared to traditional cancer treatments. Among different heating approaches, magnetic hyperthermia uses heat generation of magnetic nanoparticles. Magnetic nanoparticles generate heat when stimulated by an alternating magnetic field. The heating efficiency depends on multiple parameters including magnetic properties of magnetic nanoparticles and magnetic field used to stimulate the nanoparticles. This dataset contains physical and magnetic properties of magnetic nanoparticles, external magnetic field conditions, and specific absorption rate (SAR) representing the heat generation efficiency of magnetic nanoparticles. This dataset can be used to build machine learning models to predict heating efficiency of magnetic nanoparticles.
DOI: 10.48577/jpl.a3t9k9
title: JWST/MIRI detection of a carbon-rich chemistry in the disk of a solar nebula analog

description: It has been proposed, and confirmed by multiple observations, that disks around low mass stars display a molecule-rich emission and carbon-rich disk chemistry as compared to their hotter, more massive solar counterparts. In this work, we present JWST Disk Infrared Spectral Chemistry Survey (JDISCS) MIRI-MRS observations of the solar-mass star DoAr 33, a low-accretion rate T Tauri star showing an exceptional carbon-rich inner disk. We report detections of H2O, OH, and CO2, as well as the more complex hydrocarbons, C2H2 and C4H2. Through the use of thermochemical models, we explore different spatial distributions of carbon and oxygen across the inner disk and compare the column densities and temperatures obtained from LTE slab model retrievals. We find a best match to the observed column densities with models that have carbon enrichment, and the retrieved emitting temperature and area of C2H2 with models that have C/O = 2 − 4 inside the 500K carbon-rich dust sublimation line. This suggests that the origin of the carbon-rich chemistry is likely due to the sublimation of carbon rich grains near the soot line. This would be consistent with the presence of dust processing as indicated by the detection of crystalline silicates. We propose that this long-lived hydrocarbon rich chemistry observed around a solar-mass star is a consequence of the unusually low M-star-like accretion rate of the central star, which lengthens the radial mixing timescale of the inner disk allowing the chemistry powered by carbon grain destruction to linger.
DOI: 10.48577/jpl.sbgjjy
title: Redshifted Sodium Transient Near Exoplanet Transit

description: Neutral sodium (Na I) is an alkali metal with a favorable absorption cross-section such that tenuous gases are easily illuminated at select transiting exoplanet systems. We examine both the canonical time-averaged alkali spectrum and time-series alkali flux individually, over 4 nights at a hot Saturn system on a $\sim$ 2.8 day orbit about a Sun-like star WASP-49 A. VLT/ESPRESSO observations on UT 2020-12-15 are analyzed, providing new constraints. We recover the previously confirmed sodium density uniquely when averaged, whereas night-to-night Na I varies by more than an order of magnitude. On UT 2016-01-01 (HARPS/3.6-m) we report a Doppler redshift at $v_{ \Gamma, \mathrm{NaD}} =$ +9.7 $\pm$ 1.6 km/s with respect to the planet's rest frame. Upon examining the lightcurves we confirm stark variability on the order of $\sim$ 1-4\% in NaD. Given that sodium flux variations rarely coincide with planet transit, we explore alternatives to a planetary origin since variations are also not readily explained by stellar activity, star spots, telluric lines, nor the interstellar medium. In the UT 2016-01-01 lightcurve coincident with the Doppler redshift at dF$_{\mathrm{NaD}}$/F$_{\star}$ = 3.6 $\pm$ 1 \%, we detect a transient sodium absorption event enduring $\Delta t_{\mathrm{NaD}} \sim$ 40 minutes. Since most exoplanetary metal signatures are blueshifted due to the natural vector of radiation pressure, estimated here at roughly $\sim$ -5.7 km/s, the radial velocity is rather at +15.4 km/s, far larger than any known exoplanet system. Given that the redshift magnitude v$_{\Gamma}$ is in between the Roche limit and allowed satellite orbits, the transient sodium may be a putative indication of a natural satellite.
DOI: 10.48577/jpl.kcmtfu
title: Euclid preparation. Exploring the properties of proto-clusters in the Simulated Euclid Wide Survey

description: Galaxy proto-clusters are receiving an increased interest since most of the processes shaping the structure of clusters of galaxies and their galaxy population are happening at early stages. The Euclid Survey will provide a unique opportunity to discover a large number of proto-clusters over a large fraction of the sky. In this paper, we explore the expected observational properties of proto-clusters in the Euclid Wide Survey by means of theoretical models and simulations. We provide an overview of the predicted proto-cluster extent, galaxy density profiles, mass-richness relations, abundance, and sky-filling as a function of redshift. Useful analytical approximations for the functions of these properties are provided. The focus is on the redshift range z = 1.5 to 4. We discuss in particular the density contrast with which proto-clusters can be observed against the background in the galaxy distribution if photometric galaxy redshifts are used as supplied by the ESA-Euclid mission together with the groundbased photometric surveys. We show that the obtainable detection significance is sufficient to find large numbers of interesting proto-cluster candidates. For quantitative studies, additional spectroscopic follow-up seems to be required to certainly identify the proto-clusters and establish their richness. Key words. galaxies: clusters, cosmology: observations, cosmology: large-scale structure of the Universe
DOI: 10.5281/zenodo.14072876
title: Light-Induced Polaronic Crystals in Single-Layer Transition Metal Dichalcogenides

description: Publication set for Light-Induced Polaronic Crystals in Single-Layer Transition Metal Dichalcogenides,

Nano Letters  2024, 24, 42, 13179–13184, https://doi.org/10.1021/acs.nanolett.4c03065
DOI: 10.5281/zenodo.14072877
title: Light-Induced Polaronic Crystals in Single-Layer Transition Metal Dichalcogenides

description: Publication set for Light-Induced Polaronic Crystals in Single-Layer Transition Metal Dichalcogenides,

Nano Letters  2024, 24, 42, 13179–13184, https://doi.org/10.1021/acs.nanolett.4c03065
DOI: 10.6084/m9.figshare.27652890
title: Metagenomic Workshop Raw Reads

description: Metagenomic raw reads from a fake metagenome. For workshop
DOI: 10.6084/m9.figshare.27652890.v1
title: Metagenomic Workshop Raw Reads

description: Metagenomic raw reads from a fake metagenome. For workshop
DOI: 10.6084/m9.figshare.27652623.v1
title: toy-datasets

description: Toy datasets of different genome data and file types.