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- Creator:
- University of Michigan Museum of Zoology
- Description:
- Scan of specimen UMMZ:herps:203362 (LERISTA ORIENTALIS) - Pectoral. Raw Dataset includes 1601 TIF images (each 839 x 500 x 1 voxel at 0.01246573 mm resolution, derived from 1601 scan projections), xtek and vgi files for volume reconstruction. and Scan of specimen UMMZ:herps:203362 (LERISTA ORIENTALIS) - Pectoral. Reconstructed Dataset includes 0.012466 TIF images (each 839 x 500 x 1 voxel at 0.012466 mm resolution, derived from 1601 scan projections), xtek and vgi files for volume reconstruction.
- Keyword:
- Animalia, Chordata, Reptilia, SAURIA, SCINCIDAE, LERISTA ORIENTALIS, 1987081276, computed tomography, X-ray, and 3D
- Citation to related publication:
- For more information on the original UMMZ specimen, see: https://www.gbif.org/occurrence/1987081276
- Discipline:
- Science
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- Creator:
- Dorman, Cole J
- Description:
- CHIME provides accurate measurements while enabling inter-spacecraft calibration in constellation missions, offering a significantly more affordable alternative to traditional magnetometers without compromising measurement quality. The development of CHIME is motivated by the high number of magnetometers needed in spacecraft constellations that require a cost-effective commercial solution, as traditional, precise magnetometers are expensive and require complex ground and on-orbit calibration methods that depend on geomagnetic models or special conditions. CHIME Accuracy Calibration: - Various PNI RM3100s were used for data collection, each specified when used and how - Ground CHIME was used for experiments (50 turns per axis, hand wound) - Bartington HC1 500 mm Helmholtz coil was used for calibration baseline experiments. - Python 3.7+ Coil Homogeneity Simulations: - Python 3.7+ Optimal Calibration Pulse Parameters: - Python 3.7+ - ESA Swarm Simulation Data 50 Hz: Level 1B MAGx_HR ( https://swarm-diss.eo.esa.int). - ESA Swarm Simulation Data 1 Hz: Level 1B MAGx_LR. CHIME Calibration Accuracy Across Orbital Environments: - Python 3.7+ - ESA Swarm Simulation Data 50 Hz: Level 1B MAGx_HR ( https://swarm-diss.eo.esa.int). Comparison Simulations of Single Sensor Attitude Indepedent Calibration Methods: - Python 3.7+ - ESA Swarm Simulation Data 50 Hz: Level 1B MAGx_HR ( https://swarm-diss.eo.esa.int). Definitions: CHIME- protagonist of the dataset and accompanying manuscript, the self-calibrating magnetometer Scale Factor (SF), Non-Orthogonality (NO)- forms of magnetic sensor error PNI RM3100- internal magnetic sensor in CHIME Bartington HC1 Coil- calibration tool for the RM3100 and CHIME, a Helmholtz coil itself. ESA - European Space Agency and Updates: - March 2025: Changes to simulated calibration methodology, completed before publication initial submission or peer-review
- Keyword:
- magnetometer, calibration, Helmholtz, spacecraft, and remote sensing
- Citation to related publication:
- Dorman, C.J., Vata, J., Ojeda, L. V., Moldwin, M.B., The CHIME Magnetometer: A Self-Calibrating Approach for Enhanced Accuracy in Spaceborne Applications, Forthcoming.
- Discipline:
- Engineering
-
- Creator:
- Wan, Zhiwen, Pannala, Sravan, Solbrig, Charles, Stefanopoulou, Anna G. , Siegel, Jason B. , and Lee, Junseo
- Description:
- Lithium-ion batteries with silicon/graphite (Si/Gr) anodes achieve higher energy densities but face challenges such as rapid capacity fade, resistance growth, and complex expansion behavior under various cycling conditions. This study systematically addresses these challenges through a comprehensive test matrix to investigate the effects of pressure, temperature, state-of-charge (SoC) windows, and charge rates (C-rates) on the evolution of expansion, resistance, and capacity behavior over the lifetime of the battery. Increasing the applied pressure between 34 and 172 kPa reduced both reversible and irreversible expansion per cycle, as well as resistance growth over time, without significantly impacting capacity fade. Electrochemical Impedance Spectroscopy (EIS) confirmed that increased pressure lowered initial solution resistance and mitigated the growth of the solution and solid electrolyte interphase (SEI) resistance. Elevated temperature (45°C) extended battery cycle life despite an initial increase in resistance. Under these conditions, the lifetime impedance increase was dominated by SEI resistance. Consistent with prior studies, operating in a narrow SoC window at high SoC minimized capacity loss. Additionally, charge rates up to 2C had a limited effect on the overall degradation trends. Incremental capacity analysis (ICA) and differential voltage analysis (DVA) identified lithium inventory loss (LLI) as the primary driver of pre-knee degradation, whereas post-knee degradation resulted from a combination of LLI and anode-active material loss, particularly silicon. The deeper understanding of degradation mechanisms in batteries with Si/Gr anodes provided by this work enables the optimal packaging design and selection of operating conditions for the battery management system to extend battery cycle life.
- Keyword:
- Lithium-ion Batteries, Si/Gr Anodes, Battery Expansion, Incremental Capacity Analysis, Differential Voltage Analysis, Electrochemical Impedance Spectroscopy, and Lifetime Degradation Metrics
- Citation to related publication:
- Z. Wan et al. Degradation and Expansion of Lithium-Ion Batteries with Silicon/Graphite Anodes: Impact of Pretension, Temperature, C-rate and State-of-Charge Window
- Discipline:
- Engineering
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- Creator:
- University of Michigan Museum of Zoology
- Description:
- Scan of specimen UMMZ:herps:170644 (LERISTA MUELLERI) - Pectoral. Reconstructed Dataset includes 0.013840 TIF images (each 396 x 643 x 1 voxel at 0.013840 mm resolution, derived from 1601 scan projections), xtek and vgi files for volume reconstruction.
- Keyword:
- Animalia, Chordata, Reptilia, SAURIA, SCINCIDAE, LERISTA MUELLERI, 1987216872, computed tomography, X-ray, and 3D
- Citation to related publication:
- For more information on the original UMMZ specimen, see: https://www.gbif.org/occurrence/1987216872
- Discipline:
- Science
-
- Creator:
- University of Michigan Museum of Zoology
- Description:
- Scan of specimen UMMZ:herps:170644 (LERISTA MUELLERI) - Pelvic. Reconstructed Dataset includes 0.013840 TIF images (each 390 x 800 x 1 voxel at 0.013840 mm resolution, derived from 1601 scan projections), xtek and vgi files for volume reconstruction.
- Keyword:
- Animalia, Chordata, Reptilia, SAURIA, SCINCIDAE, LERISTA MUELLERI, 1987216872, computed tomography, X-ray, and 3D
- Citation to related publication:
- For more information on the original UMMZ specimen, see: https://www.gbif.org/occurrence/1987216872
- Discipline:
- Science
-
- Creator:
- University of Michigan Museum of Zoology
- Description:
- Scan of specimen ummz:herps:170668 (CALYPTOTIS RUFICAUDA) - Pectoral. Raw Dataset includes 1601 TIF images (each 1392 x 653 x 1 voxel at 0.01374779 mm resolution, derived from 1601 scan projections), xtek and vgi files for volume reconstruction. and Scan of specimen ummz:herps:170668 (CALYPTOTIS RUFICAUDA) - Pectoral. Reconstructed Dataset includes 0.013748 TIF images (each 1392 x 653 x 1 voxel at 0.013748 mm resolution, derived from 1601 scan projections), xtek and vgi files for volume reconstruction.
- Keyword:
- Animalia, Chordata, Reptilia, SAURIA, SCINCIDAE, CALYPTOTIS RUFICAUDA, 1987043476, computed tomography, X-ray, and 3D
- Citation to related publication:
- For more information on the original UMMZ specimen, see: https://www.gbif.org/occurrence/1987043476
- Discipline:
- Science
-
- Creator:
- University of Michigan Museum of Zoology
- Description:
- Scan of specimen ummz:herps:170668 (CALYPTOTIS RUFICAUDA) - Pelvic. Raw Dataset includes 1601 TIF images (each 688 x 1283 x 1 voxel at 0.01374779 mm resolution, derived from 1601 scan projections), xtek and vgi files for volume reconstruction. and Scan of specimen ummz:herps:170668 (CALYPTOTIS RUFICAUDA) - Pelvic. Reconstructed Dataset includes 0.013748 TIF images (each 688 x 1283 x 1 voxel at 0.013748 mm resolution, derived from 1601 scan projections), xtek and vgi files for volume reconstruction.
- Keyword:
- Animalia, Chordata, Reptilia, SAURIA, SCINCIDAE, CALYPTOTIS RUFICAUDA, 1987043476, computed tomography, X-ray, and 3D
- Citation to related publication:
- For more information on the original UMMZ specimen, see: https://www.gbif.org/occurrence/1987043476
- Discipline:
- Science
-
- Creator:
- University of Michigan Museum of Zoology
- Description:
- Scan of specimen ummz:herps:170712 (HEMIERGIS DECRESIENSIS) - Pectoral. Raw Dataset includes 1601 TIF images (each 613 x 913 x 1 voxel at 0.01387013 mm resolution, derived from 1601 scan projections), xtek and vgi files for volume reconstruction. and Scan of specimen ummz:herps:170712 (HEMIERGIS DECRESIENSIS) - Pectoral. Reconstructed Dataset includes 0.013870 TIF images (each 613 x 913 x 1 voxel at 0.013870 mm resolution, derived from 1601 scan projections), xtek and vgi files for volume reconstruction.
- Keyword:
- Animalia, Chordata, Reptilia, SAURIA, SCINCIDAE, HEMIERGIS DECRESIENSIS, 1987107849, computed tomography, X-ray, and 3D
- Citation to related publication:
- For more information on the original UMMZ specimen, see: https://www.gbif.org/occurrence/1987107849
- Discipline:
- Science
-
- Creator:
- University of Michigan Museum of Zoology
- Description:
- Scan of specimen ummz:herps:170712 (HEMIERGIS DECRESIENSIS) - Pelvic. Raw Dataset includes 1601 TIF images (each 1139 x 575 x 1 voxel at 0.01387013 mm resolution, derived from 1601 scan projections), xtek and vgi files for volume reconstruction. and Scan of specimen ummz:herps:170712 (HEMIERGIS DECRESIENSIS) - Pelvic. Reconstructed Dataset includes 0.013870 TIF images (each 1139 x 575 x 1 voxel at 0.013870 mm resolution, derived from 1601 scan projections), xtek and vgi files for volume reconstruction.
- Keyword:
- Animalia, Chordata, Reptilia, SAURIA, SCINCIDAE, HEMIERGIS DECRESIENSIS, 1987107849, computed tomography, X-ray, and 3D
- Citation to related publication:
- For more information on the original UMMZ specimen, see: https://www.gbif.org/occurrence/1987107849
- Discipline:
- Science
-
- Creator:
- University of Michigan Museum of Zoology
- Description:
- Scan of specimen UMMZ:herps:200257 (SAIPHOS EQUALIS) - Pectoral. Raw Dataset includes 1601 TIF images (each 1005 x 746 x 1 voxel at 0.01957968 mm resolution, derived from 1601 scan projections), xtek and vgi files for volume reconstruction. and Scan of specimen UMMZ:herps:200257 (SAIPHOS EQUALIS) - Pectoral. Reconstructed Dataset includes 0.019580 TIF images (each 1005 x 746 x 1 voxel at 0.019580 mm resolution, derived from 1601 scan projections), xtek and vgi files for volume reconstruction.
- Keyword:
- Animalia, Chordata, Reptilia, SAURIA, SCINCIDAE, SAIPHOS EQUALIS, 1987178200, computed tomography, X-ray, and 3D
- Citation to related publication:
- For more information on the original UMMZ specimen, see: https://www.gbif.org/occurrence/1987178200
- Discipline:
- Science