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- Creator:
- Mirshams Shahshahani, Payam
- Description:
- Please see Payam Mirshams Shahshahani's University of Michigan doctoral dissertation: https://deepblue.lib.umich.edu/bitstream/handle/2027.42/155254/mirshams_1.pdf?sequence=1
- Keyword:
- unipedal balance, hip muscle strength and endurance, age, hip moment
- Citation to related publication:
- Mirshams Shahshahani, Masteling and Ashton-Miller, article under review in IISE Transactions on Occupational Ergonomics & Human Factors, Supplement, Festschrift for Professor Thomas J. Armstrong
- Discipline:
- Engineering
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- Creator:
- Fu, Xun, Zhang, Bohao, Weber, Ceri J., Cooper, Kimberly L., Vasudevan, Ram, and Moore, Talia Y.
- Description:
- Tails used as inertial appendages induce body rotations of animals and robots---a phenomenon that is governed largely by the ratio of the body and tail moments of inertia. However, vertebrate tails have more degrees of freedom (e.g., number of joints, rotational axes) than most current theoretical models and robotic tails. To understand how morphology affects inertial appendage function, we developed an optimization-based approach that finds the maximally effective tail trajectory and measures error from a target trajectory. For tails of equal total length and mass, increasing the number of equal-length joints increased the complexity of maximally effective tail motions. When we optimized the relative lengths of tail bones while keeping the total tail length, mass, and number of joints the same, this optimization-based approach found that the lengths match the pattern found in the tail bones of mammals specialized for inertial maneuvering. In both experiments, adding joints enhanced the performance of the inertial appendage, but with diminishing returns, largely due to the total control effort constraint. This optimization-based simulation can compare the maximum performance of diverse inertial appendages that dynamically vary in moment of inertia in 3D space, predict inertial capabilities from skeletal data, and inform the design of robotic inertial appendages. and 2025-01-31: In this update, we include the code required to run the simulations and optimizations. We updated the readme file to reflect this addition
- Keyword:
- simulation, inertial maneuvering, caudal vertebrae, trajectory optimization, and reconfigurable appendages
- Citation to related publication:
- Xun Fu, Bohao Zhang, Ceri J. Weber, Kimberly L. Cooper, Ram Vasudevan, Talia Y. Moore. (in review) Jointed tails enhance control of three-dimensional body rotation.
- Discipline:
- Engineering and Science
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- Creator:
- Smolenski, Shane, Wen, Ming, Li, Qiuyang, Downey, Eoghan, Alfrey, Adam, Liu, Wenhao, Kondusamy, Aswin L. N., Bostwick, Aaron, Jozwiak, Chris, Rotenberg, Eli, Zhao, Liuyan, Deng, Hui, Lv, Bing, Zgid, Dominika, Gull, Emanuel, and Jo, Na Hyun
- Description:
- The optical properties of the 2D magnet CrSBr were explored through photoluminescence/reflectance, angle-resolved photoemission spectroscopy, and self-consistent GW calculations. These data reveal a large exciton binding energy in bulk CrSBr that is attributed to localization arising from the quasi-1D electronic structure.
- Keyword:
- Magnetism, Exciton, and ARPES
- Citation to related publication:
- Smolenski, S. et al., Large Exciton Binding Energy in the Bulk van der Waals Magnet CrSBr. arXiv:2403.13897 (2024) and Smolenski, S., Wen, M., Li, Q. et al. Large exciton binding energy in a bulk van der Waals magnet from quasi-1D electronic localization. Nat Commun 16, 1134 (2025). https://doi.org/10.1038/s41467-025-56457-x
- Discipline:
- Science
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- Creator:
- An, Yifu
- Description:
- We have ported our MHD code, BATSRUS ( https://github.com/SWMFsoftware/BATSRUS), to the GPU. This dataset contains the input parameters and raw timing results for the Paper. To reproduce the results, please follow the instructions and use the software specifications contained in readme.txt. and Abstract: BATSRUS, our state-of-the-art extended magnetohydrodynamic code, is the most used and one of the most resource-consuming models in the Space Weather Modeling Framework. It has always been our objective to improve its efficiency and speed with emerging techniques, such as GPU acceleration. To utilize the GPU nodes on modern supercomputers, we port BATSRUS to GPUs with the OpenACC API. Porting the code to a single GPU requires rewriting and optimizing the most used functionalities of the original code into a new solver, which accounts for around 1% of the entire program in length. To port it to multiple GPUs, we implement a new message passing algorithm to support its unique block-adaptive grid feature. We conduct weak scaling tests on as many as 256 GPUs and find good performance. The program has 50-60% parallel efficiency on up to 256 GPUs, and up to 95% efficiency within a single node (4 GPUs). Running large problems on more than one node has reduced efficiency due to hardware bottlenecks. We also demonstrate our ability to run representative magnetospheric simulations on GPUs. The performance for a single A100 GPU is about the same as 270 AMD "Rome" CPU cores, and it runs 3.6 times faster than real time. The simulation can run 6.9 times faster than real time on four A100 GPUs.
- Keyword:
- BATSRUS, GPU, and MHD simulation
- Citation to related publication:
- An, Y., Chen, Y., Zhou, H., Gaenko, A. and Toth, G. (2024). BATSRUS GPU: Faster than Real Time Magnetospheric Simulations with a Block Adaptive Grid Code. Being revised. A preprint is available at http://arxiv.org/abs/2501.06717.
- Discipline:
- Engineering
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- Creator:
- Heath, Jeffrey
- Description:
- Documentary videos of pottery making, notably a four-part documentary of one potter's work. Credits are at the end of videos. Additional documentaries from Mali may be added later.
- Keyword:
- pottery
- Discipline:
- Humanities
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- Creator:
- Alofs, Karen, Schell, Justin, King, Katelyn, Thomer, Andrea, Wehrly, Kevin, and Lopez-Fernandez, Hernan
- Description:
- Archives at the Institute for Fisheries Research (IFR) hold records of thousands of lake surveys from the University of Michigan and Michigan Department of Natural Resources. The records contained in this dataset are jpeg images of the index card records from the IFR surveys. Images include the front of the card and when available, the back of a card. and Treatment Report Chemical Rehabilitation cards detail the rehabilitation project that occurred in a lake. This includes the date treated, chemical used, objective of the treatment, and treatment methods. In addition, notes on the pre-treatment condition (e.g. air and water temperature) and post-treatment condition are included. These cards complement the CJUS and CEVA cards.
- Keyword:
- Lake, fish, management, and chemical treatment
- Citation to related publication:
- Erickson, Jim. "New crowdsourced project to digitize Michigan lake and fish records, looking for climate trends." University of Michigan School of Environment and Sustainability News. March 17, 2021. URL: https://seas.umich.edu/news/new-crowdsourced-project-digitize-michigan-lake-and-fish-records-looking-climate-trends
- Discipline:
- Science
-
- 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; Health, Social Determinants of Health, Long COVID, Mental Health; Disability; Perceptions of Neighborhood; Transportation mode; Financial Precarity; Perception of Control; Voting; Employment; Demographics. This data file contains 673 Ypsilanti residents' close-ended responses. The full dataset will be published on ICPSR.
- Keyword:
- Ypsilanti, MI, Household composition, Housing status, Health, Long COVID symptom, Mental health, Disability, Perceptions of neighborhood, Transportation mode, Perceptions of control, Voting, Financial precarity, Employment, and Demographics
- Discipline:
- News and Current Events and Social Sciences
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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; Health, Social Determinants of Health, Long COVID, Mental Health; Disability; Perceptions of Neighborhood; Transportation mode; Financial Precarity; Perception of Control; Voting; Employment; Demographics. This data file contains 704 Flint residents' close-ended responses. The full dataset will be published on ICPSR.
- Keyword:
- Flint, MI, Household composition, Housing status, Health, Long COVID symptom , Mental health, Disability, Perceptions of neighborhood, Transportation mode, Perceptions of control, Voting, Financial precarity, Employment, and Demographics
- 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 Right dentary of Tritemnodon (University of Michigan Museum of Paleontology catalog number UMMP VP 21186) 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, Hyaenodonta, UMMP, University of Michigan Museum of Paleontology, Eocene, and dc015725-d9cb-cc52-2868-666c63140c06
- Discipline:
- Science
-
- 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