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- Creator:
- Bougher, S. W. (University of Michigan) and Brecht, A. S. (NASA Ames Research Center)
- Description:
- This work examines the planetary wave-induced variability within the upper mesosphere/lower thermosphere of Venus by utilizing the Venus Thermospheric General Circulation Model (VTGCM). Rossby and Kelvin wave perturbations are driven by variations in the geopotential height of the VTGCM lower boundary (~70 km). A suite of simulations was conducted to examine the impact of the individual and combined waves propagating from two different lower boundary conditions (uniform and varying). The Kelvin wave is the more dominant wave which produces the most variability, as was shown in Hoshino et al., 2012. The combination of the Kelvin and Rossby waves provides a maximum temperature amplitude of 13 K at 92 km and maximum zonal wind amplitude of 23 m/s at 102 km. The combined waves overall are able to propagate up to 125 km. Most of the variation within the temperature, winds, and composition occurs between 70 km and 110 km. The varying lower boundary increases the magnitude of the wave deposition but weakly changes the propagation altitude. The thermal variation due to the planetary waves does not reproduce most observed variations. The simulated O2 IR nightglow emission is sensitive to the waves with respect to intensity and local time, but lacks latitudinal variation. The integrated intensity ranges from 1.2 MR to 1.65 MR and the local time ranges from 0.33 local time to 23.6 local time. Overall, planetary waves do affect the atmospheric structure, but there are still observed large variations that planetary waves alone cannot explain (i.e. thermal structure).
- Keyword:
- Venus, planetary waves, upper mesophere, lower thermosphere, and O2 nightglow
- Citation to related publication:
- Brecht, A. S., Bougher, S. W., Shields, D., & Liu, H.-L. (2021). Planetary-scale wave impacts on the Venusian upper mesosphere and lower thermosphere. Journal of Geophysical Research: Planets, 126, e2020JE006587. https://doi.org/10.1029/2020JE006587
- Discipline:
- Science
-
- Creator:
- Wilson Mantilla, Jeffrey A.
- Description:
- Specimen RTMNU/DG/VERT/1/55P/2020 is a partial dentary of a small noasaurid dinosaur collected from Late Cretaceous sediments near the village of Pisdura, Maharashtra, India. The specimen was collected under the auspices of a Joint Collaborative Programme through a Memorandum of Understanding involving the Geological Survey of India (Government of India, Ministry of Mines) and the University of Michigan Museum of Palaeontology. The specimen is housed in the Department of Geology of Rashtrasant Tukadoji Maharaj Nagpur University, Nagpur (Maharashtra) India. For access please contact Dhananjay Mohabey ( dinomohabey@yahoo.com) or Bandana Samant ( bandanabhu@gmail.com).
- Keyword:
- India, Dinosaur, Paleontology, Cretaceous, Maastrichtian, and Gondwana
- Citation to related publication:
- Mohabey, D. M., B. Samant, K. Vélez-Rosado, and J. A. Wilson Mantilla. (in press.) A review of small-bodied theropod dinosaurs from the Late Cretaceous of India, with description of new cranial remains of a noasaurid (Theropoda: Abelisauria). Journal of Vertebrate Paleontology. DOI:10.1080/02724634.2023.2288088
- Discipline:
- Science
-
- Creator:
- Ingrid L. Hendy and Yi Wang
- Description:
- This dataset includes core physical properties (e.g., bulk density, porosity, P-wave velocity) and magnetic susceptibility data for the box core SPR0901-unnamed (34.2816°N, 120.0415°W, 588 m water depth) measured on the multisensor track (MST). SPR0901-unnamed was collected by the research vessel R/V Sproul off Southern California in 2009.1.
- Keyword:
- physical properties, magnetic susceptibility, Santa Barbara Basin, and SPR0901-unnamed
- Citation to related publication:
- "Recover MT Receivers offshore Morro Bay/Deploy and Recover EM Sensor in the San Diego Trough." Cruise ID: SP0901. 2009. Accessible at Rolling Deck to Repository at https://doi.org/10.7284/901085
- Discipline:
- Science
-
- Creator:
- Ingrid L. Hendy and Yi Wang
- Description:
- This dataset includes core physical properties (e.g., bulk density, porosity, P-wave velocity) and magnetic susceptibility data for SPR0901-04BC (34.2816°N, 120.0415°W, 588 m water depth) measured on the multisensor track (MST). SPR0901-04BC was collected by the research vessel R/V Sproul off Southern California in 2009.1. The study is supported by NSF OCE-0752093.
- Keyword:
- physical properties, magnetic susceptibility, Santa Barbara Basin, and SPR0901-04BC
- Citation to related publication:
- "Recover MT Receivers offshore Morro Bay/Deploy and Recover EM Sensor in the San Diego Trough." Cruise ID: SP0901. 2009. Accessible at Rolling Deck to Repository at https://doi.org/10.7284/901085
- Discipline:
- Science
-
- Creator:
- Ingrid L. Hendy and Yi Wang
- Description:
- This dataset includes core physical properties (e.g., bulk density, porosity, P-wave velocity) and magnetic susceptibility data for Kasten core SPR0901-03KC (34.2832°N, 120.0401°W, 586 m water depth) measured on the multisensor track (MST). SPR0901-03KC was collected by the research vessel R/V Sproul off Southern California in 2009.1. The study is supported by NSF OCE-0752093.
- Keyword:
- physical properties, magnetic susceptibility, Santa Barbara Basin, and SPR0901-03KC
- Citation to related publication:
- "Recover MT Receivers offshore Morro Bay/Deploy and Recover EM Sensor in the San Diego Trough." Cruise ID: SP0901. 2009. Accessible at Rolling Deck to Repository at https://doi.org/10.7284/901085
- Discipline:
- Science
-
- Creator:
- Ingrid L. Hendy and Yi Wang
- Description:
- This dataset includes core physical properties (e.g., bulk density, porosity, P-wave velocity) and magnetic susceptibility data for the jumbo piston core MV0811-14JC (34.2818°N 120.0360°W, water depth: 582 m) measured on the multisensor track (MST). MV0811-14JC was collected by the research vessel R/V Melville off Southern California in 2008.11. The study is supported by NSF OCE-1304327.
- Keyword:
- physical properties, magnetic susceptibility, Santa Barbara Basin, and MV0811-14JC
- Citation to related publication:
- "BOLT Expedition, Leg 2/A Test for Extending the High-Resolution Climate Record Back to 1.2 Ma." Cruise ID: BOLT02MV. 2008. Accessible at Rolling Deck to Repository at https://doi.org/10.7284/903459
- Discipline:
- Science
-
- Creator:
- Larson, Joanna G, Hamar, Leslie, Whitcher, Courtney, Farrugia, Nicholas, and Schwarz, Eva
- Description:
- These are the data required to implement the authentic research experience (ARE) that we created and describe in our paper "The Batrachian Barf Bowl: An authentic research experience using ecological data from frog diets." We created an open-source “bowl game” competition that challenges students to identify, measure, and compare diet items across vouchered frog specimens.
- Keyword:
- Frog, Diet, Ecology, Science Education, Authentic Research Experience (ARE), Biodiversity, Herpetology, Museum Collections, Remote Learning, and Undergraduate
- Citation to related publication:
- Larson, J. G., Crowell, H. L., Walsh, L. L., & Davis Rabosky, A. R. (2022). The Batrachian Barf Bowl: An authentic research experience using ecological data from frog diets. Ecology and Evolution, 12, e9095. https://doi.org/10.1002/ece3.9095 and The above article is also available in Deep Blue Documents at https://hdl.handle.net/2027.42/174122
- Discipline:
- Science
-
- Creator:
- Thompson, Ellen P. and Ellis, Brian R.
- Description:
- Accurate prediction of physical alterations in carbonate reservoirs under dissolution is critical for development of subsurface energy technologies. The impact of mineral dissolution on flow characteristics depends on the connectivity and tortuosity of the pore network. Persistent homology is a tool from algebraic topology that describes the size and connectivity of topological features. When applied to 3D X-ray computed tomography (XCT) imagery of rock cores, it provides a novel metric of pore network heterogeneity. Prior works have demonstrated the efficacy of persistent homology in predicting flow properties in numerical simulations of flow through porous media. Its ability to combine size, spatial distribution, and connectivity information make it a promising tool for understanding reactive transport in complex pore networks, yet limited work has been done to apply persistence analysis to experimental studies on natural rocks. In this study, three limestone cores were imaged by XCT before and after acid-driven dissolution flow through experiments. Each XCT scan was analyzed using persistent homology. In all three rocks, permeability increase was driven by the growth of large, connected pore bodies. The two most homogenous samples saw an increased effect nearer to the flow inlet, suggesting emerging preferential flow paths as the reaction front progresses. The most heterogeneous sample showed an increase in along-core homogeneity during reaction. Variability of persistence showed moderate positive correlation with pore body size increase. Persistence heterogeneity analysis could be used to anticipate where greatest pore size evolution may occur in a reservoir targeted for subsurface development, improving confidence in project viability.
- Keyword:
- Carbonate dissolution, X-ray computed tomography, Porous media, Topology, and Persistent homology
- Citation to related publication:
- Thompson, E.P.; Ellis, B.R. (2023) Persistent Homology as a Heterogeneity Metric for Predicting Pore Size Change in Dissolving Carbonates. In Review.
- Discipline:
- Science and Engineering
-
- Creator:
- Lee, Dahee, Panicker, Veena, and Landis-Lewis, Zach
- Description:
- We use the term “performance summary display” (PSD) to mean a kind of visualization that relates performance levels to other types of information. In the context of healthcare organizations, PSDs are intended to be communicated to a healthcare professional, team, or organization. and Displays were identified, classified, and elements counted and coded. The performance summary display ontology provides a set of descriptions of components of displays that have been used to annotate performance feedback visualizations.
- Keyword:
- Performance
- Citation to related publication:
- Lee, D., Panicker, V., Gross, C., Zhang, J., & Landis-Lewis, Z. (2020). What was visualized? A method for describing content of performance summary displays in feedback interventions. BMC medical research methodology, 20(1), 90. https://doi.org/10.1186/s12874-020-00951-x
- Discipline:
- Health Sciences and Science
-
- Creator:
- Galaty, Michael
- Description:
- This record includes photos (JPGs) and drawings (PDF of scans of originals) of small finds, e.g., glass; coins, spindle whorls, loom weights, metal artifacts; bullets; nails; etc., as well as a list of the drawings with descriptions (PDF file) and a small finds database (.CSV). The database includes all small finds collected and analyzed by PASH, although not all small finds were drawn and photographed. Grinding stones and chipped stone are located in separate records. and Chapter linked to: Seventeen
- Keyword:
- archaeology
- Discipline:
- Humanities and Science
-
- Creator:
- Galaty, Michael
- Description:
- This work includes a .csv database, PDF scans of artifact drawings and .jpg photos. Artifact photos are accompanied by photos of artifact bags, labeled with descriptive information about the artifact, as well as photomicrographs. Work also includes raw analytical data--laser ablation – inductively-coupled plasma – mass spectroscopy (LA-ICP-MS) and petrographic data. and Chapters linked to: Ten, Eleven, Twelve, Thirteen, Fourteen, Fifteen
- Keyword:
- archaeology
- Discipline:
- Science and Humanities
-
- Creator:
- Galaty, Michael
- Description:
- Raw Sr isotope and aDNA data are archived as .xlsx files. The Sr data are reported as ratios of 87Sr to 86Sr. and Chapter linked to: Twenty
- Keyword:
- archaeology
- Discipline:
- Science and Humanities
-
- Creator:
- Galaty, Michael
- Description:
- This Work includes a .csv database file and .jpg photos of artifacts. Artifact photos are preceded by photos of artifact tags, labeled with descriptive information. Also included are portable x-ray florescence (PXRF) spectroscopic data and photomicrographs. and Descriptions/data and photos of grinding stones are in Small Finds record, https://doi.org/10.7302/5j43-mc03. Chapter linked to: Sixteen
- Keyword:
- archaeology
- Discipline:
- Science and Humanities
-
- Creator:
- Galaty, Michael
- Description:
- This work consists of an .xlsx database file. and Chapter linked to: Nineteen
- Keyword:
- archaeology
- Discipline:
- Humanities and Science
-
- Creator:
- Galaty, Michael
- Description:
- Record contains a database of chipped stones, stored as an Excel file. and Chapter linked to: Nine
- Keyword:
- archaeology
- Discipline:
- Science and Humanities
-
- Creator:
- Galaty, Michael
- Description:
- These data relate to PASH’s excavations at tumuli 099. This record contains scanned documents (excavation forms, log book, notebook, drawings), 211 .jpg images in 19 folders (labeled by date, one with candids), as well as a photolog and C14 AMS radiocarbon date data. and Chapter linked to: Eight
- Keyword:
- archaeology
- Discipline:
- Humanities and Science
-
- Creator:
- Galaty, Michael
- Description:
- These data relate to PASH’s excavations at tumuli 088. This record contains scanned documents (excavation forms, a notebook and drawings), 152 .jpg photos in 17 folders (labeled by date) and a photolog. and Chapter linked to: Eight
- Keyword:
- archaeology
- Discipline:
- Science and Humanities
-
- Creator:
- Galaty, Michael
- Description:
- These data relate to PASH’s excavations at tumuli 085. This record contains scanned documents (excavation forms, drawings, and notes--though these last are difficult to read), 34 .jpg excavation photos (no photolog), and time slice images of GPR data as a .pdf (raw geophysical data for this survey are not available). and Chapter linked to: Eight
- Keyword:
- archaeology
- Discipline:
- Humanities and Science
-
- Creator:
- Galaty, Michael
- Description:
- This work contains data generated by the survey of all mounds in the study region. and Chapter linked to: Eight
- Discipline:
- Humanities and Science
-
- Creator:
- Galaty, Michael
- Description:
- These data relate to PASH’s excavations at tumuli 052. This record contains documents (excavation forms, notes accompanied by a typed transcription, drawings), 144 photos and a photolog, seven 3D digital elevation model (DEM) images (.jpgs only), and files needed to project GPR data from T052 and Chapter linked to: Eight
- Keyword:
- archaeology
- Discipline:
- Humanities and Science
-
- Creator:
- R. Paul Acosta
- Description:
- In this study, the state-of-the-art isotope-enable global climate model (iCESM1.2) simulations of the middle Miocene and the early Eocene and Cenomanian were used to comprehensively investigate the climate forcing of paleogeography, Andean paleoelevation, global pCO2, and vegetation on the South American continent.
- Keyword:
- South America , Hydroclimate, Water isotope system, and Global climate modeling
- Discipline:
- Science
-
- Creator:
- Szuromi, Matthew P. and Stacey, William C.
- Description:
- The data and scripts are meant to show how burster dynamics determine response to a single biphasic stimulus. The files include data which show trends in the propensity of termination for different burster types and the MATLAB scripts used to generate this data. The MATLAB scripts also allow the user to generate their own data sets for alternative bursting paths and stimulus parameter combinations. Furthermore, they allow the user to visually examine the effects of single stimuli in the voltage timeseries and in state space. How the user can access these features of the script is described in the file "ReadMe.pdf."
- Keyword:
- Epilepsy, Stimulation, Modelling, Dynamics, Seizure, and Dynamotype
- Citation to related publication:
- (PROVISIONAL) Optimization of Ictal Aborting Stimulation Using the Dynamotype Taxonomy
- Discipline:
- Health Sciences, Engineering, and Science
-
- Creator:
- Shi, Xuetao, Elvati, Paolo, and Violi, Angela
- Description:
- Non-thermal plasma systems offer unique opportunities in the fields of bio-imaging, drug delivery, photovoltaics, microelectronics manufacturing. Such interests are largely inspired by the fact that hot plasma electrons coexist with neutral species and ions close to room-temperature under non-thermal plasma conditions. Modeling of these systems requires a deep understanding of the atomistic processes underlying the rich chemistry of the various radicals and ions with the nascent nanoparticle surface. A key parameter for determining the contribution of a certain radical/ion species to the nanoparticle surface growth, called sticking coefficient, is computed as a weighted sum from the simulated sticking outcomes with different collision velocities drawn from a Maxwell-Boltzmann distribution at certain temperatures. In this work, the collisions of SiHx (x=1-4) fragments and silicon cluster (Si4, Si2H6, and Si29H36) surfaces, responsible for the sticking coefficients, are simulated by molecular dynamics (MD) with a reactive force field. The dependence of sticking coefficients on temperature, H coverage of both silane fragments and cluster surfaces, and the size of the cluster, are systematically examined. And the mechanism underlying the sticking events, specifically the conversion of physical aggregation to chemisorption is investigated to better understand the complex interplay between factors influencing the surface growth. The detailed and multi-parameter model of sticking coefficients, accompanied by the mechanism study of physisorption to chemisorption conversion, provides a more accurate and robust approximation of surface growth rate using sticking coefficients, and a deeper understanding of surface growth processes, for the wider non-thermal plasma simulation community.
- Keyword:
- Sticking coefficients, Silanes, Molecular Dynamics, Non-equilibrium, and Aggregation mechanisms
- Citation to related publication:
- Shi, X., Elvati, P., Violi, A. (2021). On the growth of Si nanoparticles in non-thermal plasma: physisorption to chemisorption conversion. J. Phys. D. Submitted.
- Discipline:
- Science
-
- Creator:
- University of Michigan, Division of Herpetology, Davis Rabosky, Alison R, Larson, Joanna G, Moore, Talia Y, and Curlis, John David
- Description:
- This dataset includes dorsal and ventral photographs of Neotropical snakes collected in the Peruvian Amazon. These data were collected to survey and examine the diversity in color pattern evolution in Neotropical snakes.
- Keyword:
- snake, color, serpentes, and Peru
- Citation to related publication:
- (work in progress, not yet submitted)
- Discipline:
- Science
-
Neotropical Snake Photo and Video Data
User Collection- Creator:
- University of Michigan, Division of Herpetology, Davis Rabosky, Alison R, Moore, Talia Y., Larson, Joanna G., Curlis, John David, Westeen, Erin P., Sealey, Briana A., and Balinski, Bailey A.
- Description:
- All animal-related procedures were approved by the University of Michigan Institutional Animal Care and Use Committee (Protocols #PRO00006234 and #PRO00008306) and the Peruvian government SERFOR (Servicio Nacional Forestal y de Fauna Silvestre. and Data were collected during five field expeditions in the Amazonian lowlands of Peru from March 2016 to December 2018.
- Keyword:
- snake behavior, coral snake mimicry, serpentes, Peruvian Amazon, and Elapidae
- Discipline:
- Science
3Works -
- Creator:
- Okullo, Dolorence, Gomez-Lopez, Iris N., Goodspeed, Robert, Reddy, Shruthi, Veinot, Tiffany C, Clarke, Phillipa J., and Data Driven Detroit
- Description:
- The information and education environment refers to: 1) the presence of information infrastructures such as broadband Internet access and public libraries in a location; 2) a person’s proximity to information infrastructures and sources; 3) the distribution of information infrastructures, sources and in a specific location; and 4) exposure to specific messages (information content) within a specific location. Coverage for all data: 10-county Detroit-Warren-Ann Arbor Combined Statistical Area.
- Keyword:
- Residential Broadband Data Adoption Rates, Census tract level, Broadband Internet Access and Speed, Colleges and Universities, Public Libraries, Spatial Measures, and Schools
- Discipline:
- Science, Social Sciences, and Health Sciences
-
- Creator:
- Arbic, B.K., Elipot, S., Menemenlis, D., and Shriver, J.F.
- Description:
- The datafiles and Matlab code files in this repository contain the information needed to produce the figures in the paper. We also include the code used to process the raw model output files into spectra.
- Citation to related publication:
- B.K. Arbic, S. Elipot, J.M. Brasch, D. Menemenlis, A.L. Ponte, J.F. Shriver, X. Yu, E.D. Zaron, M.H. Alford, M.C. Buijsman, R. Abernathey, D. Garcia, L. Guan, P.E. Martin, and A.D. Nelson (2022), Near-surface oceanic kinetic energy distributions from drifter observations and numerical models. In review.
- Discipline:
- Science
-
- Creator:
- Zhang, Yan, Gao, Chuanyu, Zhang, Shaoqing, Yang, Ping, Meyers, Philip A, and Wang, Guoping
- Description:
- The study focuses on reconstructing the histories of peat deposition using n-alkane biomarkers in peat cores and associated modern plant communities from four sites around a shallow maar lake in the Changbai Mountains of northeastern China. Peat development patterns in the four sites are not concordant although the sites experienced the same paleoclimate histories. Evidently, lava flows and tephra deposits produced an uneven topography of the volcanogenic lake basin that controls the water depths at the four lake edge locations, thereby leading to differences in peat-forming plant communities and peat deposition among the four sites.
- Keyword:
- peat deposition, n-alkanes, volcanic eruptions, and Changbai Lake
- Citation to related publication:
- Zhang, Y., Gao, C., Zhang, S., Yang, P., Meyers, P. A., & Wang, G. (2020). N-Alkane-based reconstructions of peat accumulations and depositional conditions at four locations around a shallow maar lake in the Changbai Mountains, northeastern China (world) [Preprint]. Earth and Space Science Open Archive; Earth and Space Science Open Archive. https://doi.org/10.1002/essoar.10505381.1
- Discipline:
- Science
-
- Creator:
- Nguyen, Thanh H., Wright, Mason, Wellman, Michael P., and Singh, Satinder
- Description:
- In this work , we study the problem of allocating limited security countermeasures to protect network data from cyber-attacks, for scenarios modeled by Bayesian attack graphs. We consider multi-stage interactions between a network administrator and cybercriminals, formulated as a security game. We propose parameterized heuristic strategies for the attacker and defender and provide detailed analysis of their time complexity. Our heuristics exploit the topological structure of attack graphs and employ sampling methods to overcome the computational complexity in predicting opponent actions. Due to the complexity of the game, we employ a simulation-based approach and perform empirical game analysis over an enumerated set of heuristic strategies. Finally, we conduct experiments in various game settings to evaluate the performance of our heuristics in defending networks, in a manner that is robust to uncertainty about the security environment.
- Keyword:
- Empirical Game-Theoretic Analysis, Multi-stage Security Games, Attack Graph, Game Theory, and Moving Target Defense
- Discipline:
- Science and Engineering
-
- Creator:
- Alben, Silas D
- Description:
- The research involved vortex-panel simulations of fluid-structure interactions. A file Captions_for_SpanwiseVariationsMovies.pdf is included that describes the movies.
- Discipline:
- Science
-
- Creator:
- Larson, Joanna G and Weiner, Abraham
- Description:
- This dataset consists of 11 linear external morphological measurements from 1,614 adult frog individuals from 434 species that all naturally occur in the Western Hemisphere. We used these data to investigate patterns of multidimensional morphospace structure in frog assemblages along the latitudinal diversity gradient in the Americas. The measured traits are predictive of adult microhabitat use, diel activity patterns, locomotion, mating habitat, and diet.
- Keyword:
- functional traits, morphology, frog, anura, and amphibian
- Citation to related publication:
- Larson, JG, PO Title, and DL Rabosky. Expansion and packing of frog morphospace along the Western Hemisphere latitudinal diversity gradient revealed by functional traits. In prep
- Discipline:
- Science
-
- Creator:
- Sun, Xin, Zhang, Kehui, Marks, Rebecca, Karas, Zachary, Eggleston, Rachel, Nickerson, Nia , Yu, Chi-Lin, Wagley, Neelima, Hu, Xiaosu, Caruso, Valeria, Tardif, Twila, Satterfield, Teresa, Chou, Tai-Li, Kovelman, Ioulia, and Hernandez, Isabel
- Description:
- In a broad sense, this project explores morphological and phonological processing in English monolinguals and two bilingual populations, Chinese-English and Spanish-English, using a battery of standardized and self-developed behavioral measures, as well as fNIRS neuroimaging. (T1=NEW PARTICIPANTES -TESTED BEHAVIORAL AND fNIRS-, T2= RETURNING PARTICIPANTS -JUST TESTED WITH BEHAVIORAL ASSESSMENTS)
- Discipline:
- Science
2Works -
- Creator:
- Sun, Xin, Zhang, Kehui, Marks, Rebecca, Karas, Zachary, Eggleston, Rachel, Nickerson, Nia, Yu, Chi-Lin, Wagley, Neelima, Hu, Xiaosu, Caruso, Valeria, Tardif, Twila, Satterfield, Teresa, Chou, Tai-Li, and Kovelman, Ioulia
- Description:
- In a broad sense, this dataset explores morphological and phonological processing in English monolinguals and two bilingual populations, Chinese-English and Spanish-English, using a battery of standardized and self-developed behavioral measures, as well as fNIRS neuroimaging.
- Citation to related publication:
- Sun X, Zhang K, Marks R, Karas Z, Eggleston R, Nickerson N, Yu CL, Wagley N, Hu X, Caruso V, Chou TL, Satterfield T, Tardif T, Kovelman I. Morphological and phonological processing in English monolingual, Chinese-English bilingual, and Spanish-English bilingual children: An fNIRS neuroimaging dataset. Data Brief. 2022 Mar 12;42:108048. doi: 10.1016/j.dib.2022.108048. PMID: 35313503; PMCID: PMC8933821.
- Discipline:
- Science
-
- Creator:
- Hernandez, Isabel, Sun, Xin, Zhang, Kehui, Marks, Rebecca, Karas, Zachary, Eggleston, Rachel, Nickerson, Nia, Yu, Chi-Lin, Wagley, Neelima, Hu, Xiaosu, Caruso, Valeria, Tardif, Twila, Satterfield, Teresa, Chou, Tai-Li, and Kovelman, Ioulia
- Description:
- In a broad sense, this dataset explores morphological and phonological processing in English monolinguals and two bilingual populations, Chinese-English and Spanish-English, using a battery of standardized and self-developed behavioral measures. Language: English - Spanish - Chinese
- Discipline:
- Science
-
- Creator:
- Do, Hong X., Smith, Joeseph P., Fry, Lauren M., and Gronewold, Andrew D.
- Description:
- This data set contains a new monthly estimate of the water balance of the Laurentian Great Lakes, the largest freshwater system on Earth, from 1950 to 2019. The source codes and inputs to derive the new estimates are also included in this dataset. and ***ADDED 2024-02-27: The component net basins supply data "*NBSC_GLWBData.csv" in "output_ts_posterior.zip" need to be revised for further applications***
- Keyword:
- Laurentian Great Lakes, Bayesian inference, water levels, data assimilation, and water balance
- Citation to related publication:
- Do, H. X., Smith, J. P., Fry, L. M., & Gronewold, A. D. (2020). Seventy-year long record of monthly water balance estimates for Earth’s largest lake system. Scientific Data, 7(1), 276. https://doi.org/10.1038/s41597-020-00613-z, Gronewold, A. D., Smith, J. P., Read, L., & Crooks, J. L. (2020). Reconciling the water balance of large lake systems. Advances in Water Resources, 103505. https://doi.org/10.1016/j.advwatres.2020.103505 , and This version replaces the following deprecated dataset: Do, H.X., Smith, J.P., Fry, L.M., Gronewold, A.D. (2020). Monthly water balance estimates for the Laurentian Great Lakes from 1950 to 2019 [Data set]. University of Michigan - Deep Blue. https://doi.org/10.7302/0rsp-v195
- Discipline:
- Science
-
Monthly water balance estimates for the Laurentian Great Lakes from 1950 to 2019 (v1.0) [Deprecated]
- Creator:
- Do, Hong X., Smith, Joeseph P., Fry, Lauren M., and Gronewold, Andrew D.
- Description:
- This data set contains a new estimate of monthly water balance components from 1950 to 2019 for the Laurentian Great Lakes, the largest freshwater system on Earth. The source code and inputs to derive the new estimates are also included in this dataset.
- Keyword:
- Great Lakes water levels, statistical inference, water balance, and data assimilation
- Citation to related publication:
- Do, H.X., Smith, J., Fry, L.M., and Gronewold, A.D., Seventy-year long record of monthly water balance estimates for Earth’s largest lake system (pending for submission) and Version Note: This dataset is deprecated and has been replaced by version 1.1, found at https://deepblue.lib.umich.edu/data/concern/data_sets/sb3978457
- Discipline:
- Science
-
- Creator:
- Shah, Bhavarth
- Description:
- The three approaches used three distinct datasets named as follows: Historicalwater_levels.csv, Historical_Precipitation.csv, and Bayesian Statistical dataset.csv. These files are accessible using Microsoft Office or similar software. The machine learning models are developed in Jupyter Notebook (.ipynb) files, named according to the datasets they utilize. However, for the third approach, the models are named Random Forest, LSTM Model Base, and Multivariate LSTM Models. More details are available on the Shah_Bhavarth_Readme.txt. These notebooks can be accessed through Python, Project Jupyter, or Google Colab, and dependencies include libraries such as Pandas, NumPy, Matplotlib, Scikit-learn, Keras, and TensorFlow. The supplementary material also includes Excel files for stage-curve calculations and diversions, named Water_levels_Stage_Curve_Calculations1970-2018.xlsx and Diversions_calculation.xlsx, respectively.
- Keyword:
- Machine learning, Forecasting, Water levels, Mono lake, and Hydrology
- Citation to related publication:
- Shah, Bhavarth. 2024. "Mono Lake Water Levels Forecasting Using Machine Learning." Master’s thesis, University of Michigan, School for Environment and Sustainability. ORCID iD: 0000-0002-2391-8610. https://dx.doi.org/10.7302/22659
- Discipline:
- Science and Engineering
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- Creator:
- Elvati, Paolo, Luyet, Chloe, Wang, Yichun, Liu, Changjiang, VanEpps, J. Scott, Kotov, Nicholas A., and Violi, Angela
- Description:
- Amyloid nanofibers are abundant in microorganisms and are integral components of many biofilms, serving various purposes, from virulent to structural. Nonetheless, the precise characterization of bacterial amyloid nanofibers has been elusive, with incomplete and contradicting results. The present work focuses on the molecular details and characteristics of PSMa1-derived functional amyloids present in Staphylococcus aureus biofilms, using a combination of computational and experimental techniques, to develop a model that can aid the design of compounds to control amyloid formation. Results from molecular dynamics simulations, guided and supported by spectroscopy and microscopy, show that PSMa1 amyloid nanofibers present a helical structure formed by two protofilaments, have an average diameter of about 12 nm, and adopt a left-handed helicity with a periodicity of approximately 72 nm. The chirality of the self-assembled nanofibers, an intrinsic geometric property of its constituent peptides, is central to determining the fibers' lateral growth.
- Keyword:
- molecular self-assembly, computational nanotechnology, nanobiotechnology, and structural properties
- Citation to related publication:
- Paolo Elvati, Chloe Luyet, Yichun Wang, Changjiang Liu, J. Scott VanEpps, Nicholas A. Kotov, and Angela Violi ACS Applied Nano Materials 2023 6 (8), 6594-6604 DOI: 10.1021/acsanm.3c00174
- Discipline:
- Engineering and Science
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- Creator:
- Burleigh, M.
- Description:
- Brightness from an all-sky imager has been used as a spatiotemporal constraint for auroral inputs selected from in situ rocket measurements which are used to drive the ionospheric model. This method allows for realistic ionospheric forcing that is not captured in traditional "on-off" methods of describing PMAFs. Transient forcing (simulated PMAFs) and steady forcing ("on-off") simulations have been generated for comparison.
- Keyword:
- Poleward moving auroral forms, High-latitude ionosphere, Ionospheric modeling, Transient forcing, PMAF, GEMINI-TIA, and RENU2
- Citation to related publication:
- Burleigh, M., Zettergren, M., Lynch, K., Lessard, M., Moen, J., Clausen, L., Kenward, D., Hysell, D., and Liemohn, M. (2019). Transient ionospheric upflow driven by poleward moving auroral forms observed during the Rocket Experiment for Neutral Upwelling 2 (RENU2) campaign. Geophysical Research Letters. (Submitted).
- Discipline:
- Science
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- Creator:
- Ozturk, Dogacan
- Description:
- The global magnetosphere-ionosphere-thermosphere (M-I-T) system is intrinsically coupled and susceptible to external drivers such as solar wind dynamic pressure enhancements. In order to understand the large-scale dynamic processes in the M-I-T system due to the compression from the solar wind, the 17 March 2015 sudden commencement was studied in detail using global numerical models. This data set is comprised of the simulation data generated from these models. and NOTE: The following changes were made to this dataset on March 28, 2018. First, two mp4 files were added. Second, the symbol representing "degree" was not rendering properly in the README file. The symbols were removed and replaced with the word "degree". Third, the metadata in the "methodology" and "description" fields were revised for content and clarity. On April 16, 2018 a citation to the corresponding article was added to the metadata record.
- Keyword:
- MHD model, BATS'R'US, and GITM
- Citation to related publication:
- Ozturk, D. S., Zou, S., Ridley, A. J., & Slavin, J. A. (2018). Modeling study of the geospace system response to the solar wind dynamic pressure enhancement on 17 March 2015. Journal of Geophysical Research: Space Physics, 123, 2974–2989. https://doi.org/10.1002/2017JA025099
- Discipline:
- Science
-
- Creator:
- Regoli, Leonardo H.
- Description:
- The data corresponds to outputs from the Mars Global Ionosphere Thermosphere Model (M-GITM), the multi-species magnetohydrodynamics (MS-MHD) and multi-fluid magnetohydrodynamics (MF-MHD) codes used during the study presented in "Multi-species and multi-fluid MHD approaches for the study of ionospheric escape at Mars" by Regoli et al. and Dataset citation: Regoli, L.H. (2018). Model outputs for "Multi-species and multi-fluid MHD approaches for the study of ionospheric escape at Mars" [Data set]. University of Michigan Deep Blue Data Repository. https://doi.org/10.7302/Z2GH9G49
- Keyword:
- GCM, MHD, and Mars
- Citation to related publication:
- Regoli, L.H., Dong, C., Ma, Y.J., Dubinin, E., Manchester, W.B., Bougher, S.W., & Welling, D.T. (2018). Multispecies and multifluid MHD approaches for the study of ionospheric escape at Mars. Journal of Geophysical Research: Space Physics, 123. https://doi.org/10.1029/2017JA025117
- Discipline:
- Science
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- Creator:
- Bacon, Elizabeth, Hanson, Erika N., Austin, Sarah, Delacroix, Emerson, Uhlmann, Wendy, Roberts, Scott, and Resnicow, Ken
- Description:
- Survey respondents were cancer-affected patients seen at an academic medical center, and self-reported experiences with genetic testing and counseling. This is raw dataset is saved in comma separated value (.csv) format.
- Keyword:
- Genetic Testing, Clinician Recommandation , NCCN Guidelines, Hereditary Genetic Testing, and Disparities in Genetic Counseling
- Citation to related publication:
- American Association of Kidney Patients: A List of Support Groups in Michigan. https://aakp.org/wp-content/uploads/2020/06/Support-Groups-Michigan.pdf
- Discipline:
- Science and Health Sciences
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- Creator:
- Lehman John T
- Description:
- Data were collected while developing a management plan for eliminating nuisance algal blooms in a chain of reservoirs along the Huron River in southeastern Michigan. Federal funding was provided by both the U.S. EPA and the USDA. The river-reservoir system is used for municipal drinking water, wastewater disposal, irrigation, industrial processes, hydroelectric generation, sport fishing, and recreation. The impoundments episodically developed surface scums of cyanobacteria, contained microcystin toxins, and emitted foul odors including hydrogen sulfide. Past management strategy had focused on external phosphorus loading but failed to prevent nuisance conditions. Data collection and analysis pointed to the overwhelming role of internal nutrient loading and resulted in a series of whole lake experiments that destratified Ford Lake during summer and eliminated the nuisance conditions.
- Keyword:
- Eutrophication, Limnology, and Nuisance Algae
- Citation to related publication:
- Ferris JA, Lehman JT. 2007. Interannual variation in diatom bloom dynamics: roles of hydrology, nutrient limitation, sinking, and whole lake manipulation. Water Res. 41:2551-2562., Ferris JA, Lehman JT. 2008. Nutrient budgets and river impoundments: Interannual variation and implications for detecting future changes. Lake Reserv Manage. 24:273-281., Goldenberg SZ, Lehman JT. 2012. Diatom response to the whole lake manipulation of a eutrophic urban impoundment. Hydrobiologia 691:71-80., Lehman EM, McDonald KE, Lehman JT. 2009. Whole lake selective withdrawal experiment to control harmful cyanobacteria in an urban impoundment. Water Res. 43:1187-1198., Lehman JT, Ferris JA, Platte RA. 2007. Role of hydrology in development of a vernal clear water phase in an urban impoundment. Freshwater Biol. 52:1773-1781., Lehman JT, Bell DW, McDonald KE. 2009. Reduced river phosphorus following implementation of a lawn fertilizer ordinance. Lake Reserv Manage. 25:307-312., Lehman JT. 2011. Nuisance cyanobacteria in an urbanized impoundment: Interacting internal phosphorus loading, nitrogen metabolism, and polymixis. Hydrobiologia 611:277-287., Lehman JT, Bell DW, Doubek JP, McDonald KE. 2011. Reduced additions to river phosphorus for three years following implementation of a lawn fertilizer ordinance. Lake Reserv Manage. 27:390-397. , Lehman JT, Doubek JP, Jackson EW. 2013. Effect of reducing allochthonous P load on alkaline phosphatase activity of phytoplankton in an urbanized watershed, SE Michigan, U.S.A. Lake Reserv Manage. 29:116-125., Lehman JT 2014. Understanding the role of induced mixing for management of nuisance algal blooms in an urbanized reservoir. Lake Reserv Manage. 30:1-9., and McDonald KE, Lehman JT. 2013. Dynamics of Aphanizomenon and Microcystis (cyanobacteria) during experimental manipulation of an urban impoundment. Lake Reserv Manage. 29:103-115.
- Discipline:
- Science
-
- Creator:
- Allen, David N, Vandermeer, John, Dick, Christopher W, Perfecto, Ivette, and Burnham, Robyn J
- Description:
- These data are in the standard ForestGEO format. Each of the three censuses has its own text file. Within that file each row represents a stem measured in that census. Species information can be found in the species file. The personnel responsible for this work can be found in the personnel file. See the readme file for more information.
- Keyword:
- Forest ecology, Oak-hickory forest, Mesophication, and Invasive species
- Citation to related publication:
- Allen, D, CW Dick, RJ Burnham, I Perfecto, and J Vandermeer. The Michigan Big Woods research plot at the Edwin S. George Reserve, Pinckney, MI, USA. Occasional Papers of the Museum of Zoology. In review.
- Discipline:
- Science
-
- Creator:
- Umaña, María Natalia, Zambrano, Jenny, Weemstra, Monique, and Allen, Dave
- Description:
- The objective of this research was to improve our understanding of tree growth from underlying variation in leaf and root functional traits. This knowledge ultimately enhances our knowledge of the above- and belowground processes that are involved in structuring forest communities. To this end, we determine which, how and to what degree (combinations of) leaf and root traits influence growth rates across ten temperate tree species along a soil carbon (C) and N gradient growing at the Big Woods plot at the E.S. George Reserve, Pickney, MI. This plot is part of the Smithsonian Institution's Forest Global Earth Observatory (ForestGEO) global network of forest research sites. https://forestgeo.si.edu/ and This dataset contains data on the leaf and root traits of several individuals from tree species, as well as on the soil properties at the Big Woods plots at the E.S. George Reserve, Pickney, MI. Data were collected in June 2019, and used to explain and predict the growth rates of the trees at Big Woods. [Growth data were obtained from Allen et al., 2019, https://doi.org/10.7302/wx55-kt18]. Each file contains data on leaf traits, root traits, and soil properties. Trait data are presented per individual tree for each of the 10 study species. Soil data are represented per soil sample, with four soil samples collected per subplot throughout the Big Woods plot (see legend, and publication for explanation). Descriptions and units per variable/column are provided in the legend tab in each file.
- Keyword:
- ecology, forests, Michigan, ForestGEO, Big Woods, Roots, Leaves, Tree growth, and Forest soils
- Citation to related publication:
- M. Weemstra, J. Zambrano, D. Allen, MN Umaña. (In press) Tree growth increases through opposing above- and belowground resource strategies. Journal of Ecology. https://doi.org/10.1111/1365-2745.13729
- Discipline:
- Science
-
- Creator:
- Chen, Yuxi
- Description:
- We use the MHD with embedded particle-in-cell model (MHD-EPIC) to study the Geospace Environment Modeling (GEM) dayside kinetic processes challenge event at 01:50-03:00 UT on 2015-11-18, when the magnetosphere was driven by a steady southward IMF. In the MHD-EPIC simulation, the dayside magnetopause is covered by a PIC code so that the dayside reconnection is properly handled. We compare the magnetic fields and the plasma profiles of the magnetopause crossing with the MMS3 spacecraft observations. Most variables match the observations well in the magnetosphere, in the magnetosheath, and also during the current sheet crossing. The MHD-EPIC simulation produces flux ropes, and we demonstrate that some magnetic field and plasma features observed by the MMS3 spacecraft can be reproduced by a flux rope crossing event. We use an algorithm to automatically identify the reconnection sites from the simulation results. It turns out that there are usually multiple X-lines at the magnetopause. By tracing the locations of the X-lines, we find the typical moving speed of the X-line endpoints is about 70~km/s, which is higher than but still comparable with the ground-based observations.
- Keyword:
- MHD, PIC, and simulation
- Citation to related publication:
- Chen, Y., Tóth, G., Hietala, H., Vines, S. K., Zou, Y., Nishimura, Y., Silveira, M. V. D., Guo, Z., Lin, Y., & Markidis, S. (2020). Magnetohydrodynamic With Embedded Particle-In-Cell Simulation of the Geospace Environment Modeling Dayside Kinetic Processes Challenge Event. Earth and Space Science, 7(11), e2020EA001331. https://doi.org/10.1029/2020EA001331 and Chen, Yuxi, et al. "Magnetohydrodynamic with embedded particle-in-cell simulation of the Geospace Environment Modeling dayside kinetic processes challenge event." arXiv preprint arXiv:2001.04563 (2020). https://arxiv.org/abs/2001.04563
- Discipline:
- Science
-
- Creator:
- Xiantong Wang
- Description:
- Magnetospheric sawtooth oscillations are observed during strong and steady solar wind driving conditions. The simulation results of our global MHD model with embedded kinetic physics show that when the total magnetic flux carried by constant solar wind exceeds a threshold, sawtooth-like magnetospheric oscillations are generated. Different from previous works, this result is obtained without involving time-varying ionospheric outflow in the model. The oscillation period and amplitude agree well with observations. The simulated oscillations cover a wide range of local times, although the distribution of magnitude as a function of longitude is different from observations. Our comparative simulations using ideal or Hall MHD models do not produce global time-varying features, which suggests that kinetic reconnection physics in the magnetotail is a major contributing factor to sawtooth oscillations.
- Discipline:
- Science
-
- Creator:
- Xiantong Wang
- Description:
- Bursty bulk flows (BBFs) are identified as the fast earthward-propagating flows from magnetic reconnection in Earth's magnetotail. BBFs are related to particle energization process reported by satellite observations. For the first time, we use a novel numerical model that simulates kinetic physics directly in a global model. The energization of the electrons associated with BBF is demonstrated by the model. The electron velocity distribution functions (VDFs) extracted from multiple locations associated with BBF demonstrate good agreements with the observations. The energy-dependent electron pitch angle distribution at the leading part of the BBF can be explained by the enhancement of the local magnetic field.
- Discipline:
- Science
-
- Creator:
- Xiantong Wang
- Description:
- We perform a geomagnetic event simulation using a newly developed magnetohydrodynamic with adaptively embedded particle-in-cell (MHD-AEPIC) model. We have developed effective criteria to identify reconnection sites in the magnetotail and cover them with the PIC model. The MHD-AEPIC simulation results are compared with Hall MHD and ideal MHD simulations to study the impacts of kinetic reconnection at multiple physical scales. At the global scale, the three models produce very similar SYM-H and SuperMag Electrojet (SME) indexes, which indicates that the global magnetic field configurations from the three models are very close to each other. At the mesoscale we compare the simulations with in situ Geotail observations in the tail. All three models produce reasonable agreement with the Geotail observations. The MHD-AEPIC and Hall MHD models produce tailward and earthward propagating fluxropes, while the ideal MHD simulation does not generate flux ropes in the near-earth current sheet. At the kinetic scales, the MHD-AEPIC simulation can produce a crescent shape distribution of the electron velocity space at the electron diffusion region which agrees very well with MMS observations near a tail reconnection site. These electron scale kinetic features are not available in either the Hall MHD or ideal MHD models. Overall, the MHD-AEPIC model compares well with observations at all scales, it works robustly, and the computational cost is acceptable due to the adaptive adjustment of the PIC domain.
- Keyword:
- MHD, PIC, and Magnetosphere
- Discipline:
- Science
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- Creator:
- Moore, Talia Y, Villacis Nunez, C Nathaly, Ray, Andrew P, and Cooper, Kimberly L
- Description:
- Hind limbs can undergo dramatic changes in loading conditions during the transition from quadrupedal to bipedal locomotion. For example, the most early diverging bipedal jerboas (Rodentia: Dipodidae) are some of the smallest mammals in the world, with body masses that range 2-4 grams. The larger jerboa species exhibit developmental and evolutionary fusion of the central three metatarsals into a single cannon bone. We hypothesize that body size reduction and metatarsal fusion are mechanisms to maintain the safety factor of the hind limb bones despite the higher ground reaction forces associated with bipedal locomotion. Using finite element analysis to model collisions between the substrate and the metatarsals, we found that body size reduction was insufficient to reduce bone stress on unfused metatarsals, based on the scaled dynamics of larger jerboas, and that fused bones developed lower stresses than unfused bones when all metatarsals are scaled to the same size and loading conditions. Based on these results, we conclude that fusion reinforces larger jerboa metatarsals against high ground reaction forces. Because smaller jerboas with unfused metatarsals develop higher peak stresses in response to loading conditions scaled from larger jerboas, we hypothesize that smaller jerboas use alternative dynamics of bipedal locomotion that reduces the impact of collisions between the foot and substrate.
- Keyword:
- finite element, functional morphology, bipedal, jerboa, metatarsus, and bone fusion
- Citation to related publication:
- Villacis Nunez, Ray, Cooper, Moore (submitted). Body size reduction and metatarsal fusion were distinct mechanisms to resist bending as jerboas (Dipodidae) transitioned from quadrupedal to bipedal.
- Discipline:
- Science and Engineering