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- Creator:
- Colón-Rodríguez, Stephanie, Liemohn, Michael, and Raines, Jim
- Description:
- During its trajectory, Wind spent a significant amount of time in the magnetotail, where its SupraThermal Ion Composition Spectrometer (STICS) measured the mass and mass per charge of protons, alpha particles, and heavy ions with an energy/charge ratio up to 226 keV/e. Although STICS originally aimed to measure the abundance of these ion species in the solar wind, its measurements within the magnetosphere from 1995 to 2002 help us identify preferential entry between the different solar wind ion species. This study statistically analyzes how the ratio between solar wind heavy ions and alpha particles (Heavies Solar Wind / He2+) varies for different upstream conditions and locations within the magnetosphere: northward vs. southward Interplanetary Magnetic Field (IMF), low vs. high solar wind density (Nsw), low vs. high solar wind dynamic pressure (PDyn), slow vs. fast solar wind (Vsw), and dawn vs. dusk. Our results indicate that the HeaviesSolar Wind enter the magnetosphere more efficiently than He2+ during northward IMF and that the Heavies Solar Wind / He2+ ratios decrease during high PDyn. In addition, the Heavies Solar Wind / He2+ ratios exhibit a dawn-dusk asymmetry, highly skewed towards the dawn side for all upstream cases likely due to charge-exchange processes.
- Keyword:
- Magnetosphere, Wind STICS, Solar wind heavy ions, Alpha particles, dawn-dusk asymmetry
- Citation to related publication:
- Colón-Rodríguez, S., Liemohn, M. W., & Raines, J. M (2024). Solar wind heavy ions and alpha particles within Earth’s magnetosphere and their variability with upstream conditions. Journal of Geophysical Research Space Physics. In preparation.
- Discipline:
- Science
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- Creator:
- Gable, Sydney L and Huang, Yihe
- Description:
- This dataset includes a catalog of events for the 2019 Ridgecrest, CA earthquake sequence with calibrated relative moment magnitude estimates. We include results from all cases described in Gable and Huang 2024b.
- Keyword:
- relative magnitude, earthquakes, earthquake magnitude, moment magnitude, and local magnitude
- Citation to related publication:
- Gable, S.L., and Y. Huang (2024). Quantifying Magnitude Uncertainty of the 2019 Ridgecrest Earthquake Sequence Through a Sensitivity Study of the Relative Magnitude Method. Bull. Seismol. Soc. Am. (in production)
- Discipline:
- Science
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- Creator:
- Alvarado, Roman, Hodges, Cameron, Sukovich, Jonathan, Greve, Joan, and Meiners, Jens-Christian
- Description:
- We study the pathophysiology of spinal cord decompression sickness. We saturated ex-vivo bovine spinal cord tissue with nitrogen, partially decompressed the samples to induce bubble formation, and then probed the mechanical response of the surrounding tissue by pressure-cycling.
- Keyword:
- Decompression Sickness
- Citation to related publication:
- Alvarado, et al. (2024). Mechanical Damage to Spinal Cord Tissue from Decompression Bubble Expansion. To be submitted to Journal of Neurotrauma
- Discipline:
- Science
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- Creator:
- Esquivel, Amanda and Ajdaroski, Mirel
- Description:
- The ability to accurately measure tibiofemoral angles during various dynamic activities is of clinical interest. The purpose of this study was to determine if inertial measurement units (IMUs) can provide accurate and reliable angle estimates during dynamic actions. A tuned quaternion conversion (TQC) method tuned to dynamics actions was used to calculate Euler angles based on IMU data and these calculated angles were compared to a motion capture system (our “gold” standard) and a commercially available sensor fusion algorithm. Nine healthy athletes were in-strumented with APDM Opal IMUs and asked to perform nine dynamic actions; five participants were used in training the parameters of the TQC method with the remaining four used to test validity.
- Keyword:
- wearable sensors
- Citation to related publication:
- Ajdaroski M, Esquivel A. Can Wearable Sensors Provide Accurate and Reliable 3D Tibiofemoral Angle Estimates during Dynamic Actions? Sensors. 2023; 23(14):6627. https://doi.org/10.3390/s23146627
- Discipline:
- Engineering
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- Creator:
- Gerber, Elisabeth R., Morenoff, Jeffrey D., Ostfeld, Mara C., Sand, Sharon L., and Fan, Yucheng
- Description:
- Survey topics included: Household Composition, Residence and Housing Status; Perceptions of Neighborhood; Neighborhood Blight; Social Connection, Social Isolation, Loneliness; Election; Employment; Crime, Violence, Safety & Violence Reduction Programs; Municipal Services and Democratic Values. This data file contains 2,450 Detroit residents' close-ended responses. The full dataset will be published on ICPSR.
- Keyword:
- Detroit, Employment, Neighborhood, Blight, Social cohesion, Election, Crime, Violence, Violence reduction program, Municipal service, Demographics, Voting, and Social connection
- Discipline:
- Social Sciences and News and Current Events
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- Creator:
- University of Michigan Museum of Paleontology and CTEES
- Description:
- Reconstructed CT slices for Cranium of Castoroides (University of Michigan Museum of Paleontology catalog number UMMP VP 3110) as a series of TIFF images. Raw projections are not included in this dataset. The reconstructed slice data resulting from a merge of two separate scans are offered here as a series of unsigned 16-bit integer TIFF images. There may be slight differences in voxel grey values between the two parts. The upper left corner of the first image (*_0000.tif) is the XYZ origin.
- Keyword:
- Paleontology, Fossil, CT, Castoridae, UMMP, University of Michigan Museum of Paleontology, Pleistocene, and 31eda2a8-fcbc-8f52-1990-0958711906a3
- Discipline:
- Science
-
- Creator:
- University of Michigan Museum of Paleontology and CTEES
- Description:
- Reconstructed CT slices for Cranium of Castoroides (University of Michigan Museum of Paleontology catalog number UMMP VP 3110) as a series of TIFF images. Raw projections are not included in this dataset. The reconstructed slice data from the scan are offered here as a series of unsigned 16-bit integer TIFF images. The upper left corner of the first image (*_0000.tif) is the XYZ origin.
- Keyword:
- Paleontology, Fossil, Castoridae, UMMP, University of Michigan Museum of Paleontology, Pleistocene, and 31eda2a8-fcbc-8f52-1990-0958711906a3
- Discipline:
- Science
-
- Creator:
- University of Michigan Museum of Paleontology and CTEES
- Description:
- Reconstructed CT slices for Cranium of Castoroides (University of Michigan Museum of Paleontology catalog number UMMP VP 3110) as a series of TIFF images. Raw projections are not included in this dataset. The reconstructed slice data from the scan are offered here as a series of unsigned 16-bit integer TIFF images. The upper left corner of the first image (*_0000.tif) is the XYZ origin.
- Keyword:
- Paleontology, Fossil, CT, Castoridae, UMMP, University of Michigan Museum of Paleontology, Pleistocene, and 31eda2a8-fcbc-8f52-1990-0958711906a3
- Discipline:
- Science
-
- Creator:
- Dhillon, Paramveer, Panda, Anmol, and Hemphill, Libby
- Description:
- The internet has significantly transformed how news is produced, consumed, and distributed. As a result, the news industry has transitioned from ad-supported to subscription-based models regulated by digital paywalls. In light of this disruption, it’s crucial to investigate not only how news consumers adapt to this change but also how economic incentives shape content coverage. We analyzed the staggered adoption of digital paywalls by 17 regional U.S. newspapers over 17 years in a difference-in-difference framework to examine the impact of paywall adoption on topical news content coverage. Our results reveal a small but significant decrease in local and soft news coverage, with varying effects across different urban contexts. Specifically, local news coverage experienced a more substantial decline in smaller cities (population < 500,000) and regions experiencing an influx of younger residents (age < 40 years). Conversely, soft news coverage increased in areas with a younger demographic influx, indicating a strategic shift by newspapers to cater to digital-savvy audiences and adapt to changing consumption patterns. Our findings underscore the delicate balance between financial imperatives and editorial choices in the newspaper industry and highlight the need for ongoing research into the effects of digital monetization strategies on journalistic content creation, media plurality, and civic accountability.
- Keyword:
- news media; paywalls; causal inference
- Discipline:
- Social Sciences
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CT Data of UMMP VP 3110, Castoroides ohioensis, cranium
User Collection
- Creator:
- University of Michigan Museum of Paleontology
- Description:
- This collection includes data from two CT scans of parts of the cranium as well as a merged dataset including the entire cranium in one volume.
- Keyword:
- Paleontology, Fossil, CT, Castoridae, UMMP, University of Michigan Museum of Paleontology, Pleistocene, and 31eda2a8-fcbc-8f52-1990-0958711906a3
- Discipline:
- Science
3Works