cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.18739/a2cj87m9f
title: Babe Creek Summit Tree Ring Data [Wolken, J.]

description: Tree ring data from the International Tree Ring Data Bank and World Data Center for Paleoclimatology archives. Data include raw treering measurements of annual ring width for multiple treering samples collected from the Summit location of the Babe Creek toposequence. Dated series were visually and then statistically crossdated with the program COFECHA.
DOI: 10.18739/a27w6769h
title: Babe Creek Toe Slope Tree Ring Data [Wolken, J.]

description: Tree ring data from the International Tree Ring Data Bank and World Data Center for Paleoclimatology archives. Data include raw treering measurements of annual ring width for multiple treering samples collected from the Toe slope location of the Babe Creek toposequence to study the climate-growth relationships of black spruce. Dated series were visually and then statistically crossdated with the program COFECHA.
DOI: 10.18739/a2445hd65
title: Babe Creek Valley Bottom Tree Ring Data [Wolken, J.]

description: Data include raw treering measurements of annual ring width for multiple treering samples collected from the Valley bottom location of the Babe Creek toposequence to study the climate-growth relationships of black spruce. Dated series were visually and then statistically crossdated with the program COFECHA.
DOI: 10.18739/a20c4sm21
title: Carbon isotope data from modern and fossil tree rings

description: Bulk carbon isotope measurements made at high-resolution across modern and fossil tree rings are reported. Fossil data are reported as the average of 3 replicate measurements. More details on the methods and samples can be found in these publications. Modern data were published in: Schubert, B. A., and Jahren, A. H., 2011, Quantifying seasonal precipitation using high-resolution carbon isotope analyses in evergreen wood: Geochimica et Cosmochimica Acta, v. 75, no. 22, p. 7291-7303; doi:7210.1016/j.gca.2011.7208.7002. Fossil data were published in: Schubert, B. A., Jahren, A. H., Eberle, J. J., Sternberg, L. S. L., and Eberth, D. A., 2012, A summertime rainy season in the Arctic forests of the Eocene: Geology, v. 40, no. 6, p. 523-526.
DOI: 10.5517/ccdc.csd.cc2970l5
title: CCDC 2121906: Experimental Crystal Structure Determination

description: Related Article: Miao Zeng, Hongwu Jiang, Kaiwen Li, Zhuqi Chen, Guochuan Yin|2022|J.Org.Chem.|87|4524|doi:10.1021/acs.joc.1c02783
DOI: 10.5281/zenodo.6412577
title: DeMeGRaS_samples_data_2022-04

description: DeMeGRaS_samples_data_2022-04 Layouts, fabrication steps, optical- and SEM pictures
DOI: 10.5281/zenodo.6412576
title: DeMeGRaS_samples_data_2022-04

description: DeMeGRaS_samples_data_2022-04 Layouts, fabrication steps, optical- and SEM pictures
DOI: 10.6084/m9.figshare.14270267.v9
title: SplitFrictionModel Worksheet

description: Worksheets from The Split Friction Model - Introducing Mixed Lubrication to Curling by Martin Ziegler<br>
DOI: 10.6084/m9.figshare.19514386
title: Microspectroscopy_rawData.xlsx

description: Connected crystal was measured using a spatially resolved microspectroscopic system for emission detection at specific regions of the merged crystal.
DOI: 10.6084/m9.figshare.19514386.v1
title: Microspectroscopy_rawData.xlsx

description: Connected crystal was measured using a spatially resolved microspectroscopic system for emission detection at specific regions of the merged crystal.
DOI: 10.6084/m9.figshare.19514449
title: DFT.rar

description: DFT calculation for optimized structures with the addition of py molecules to the system, and energy calculation of states.
DOI: 10.6084/m9.figshare.19514449.v1
title: DFT.rar

description: DFT calculation for optimized structures with the addition of py molecules to the system, and energy calculation of states.
DOI: 10.6084/m9.figshare.19514377
title: Quantum Yields.rar

description: Quantum yields of the synthesized molecules.
DOI: 10.6084/m9.figshare.19514353
title: PXRD_RawData.xlsx

description: PXRD of transformed molecules.
DOI: 10.6084/m9.figshare.19514353.v1
title: PXRD_RawData.xlsx

description: PXRD of transformed molecules.
DOI: 10.6084/m9.figshare.19514359
title: Photo_rawdata.xlsx

description: Steady state photoluminescence of the synthesized molecules.
DOI: 10.6084/m9.figshare.19514359.v1
title: Photo_rawdata.xlsx

description: Steady state photoluminescence of the synthesized molecules.
DOI: 10.25345/c5gx44z4t
title: MassIVE MSV000089193 - Top-down venomics of 12 turkish viper species
title: Top-down venom proteome analysis of reduced (TCEP) and native venom samples from twelve turkish viper species.
DOI: 10.6084/m9.figshare.19514380.v1
title: T dependent lifetime.rar

description: Temperature dependent emission lifetime of emissive molecules.
DOI: 10.6084/m9.figshare.19514380
title: T dependent lifetime.rar

description: Temperature dependent emission lifetime of emissive molecules.
DOI: 10.6084/m9.figshare.16832560.v3
title: Fluid-driven transport of round sediment particles: from discrete simulations to continuum modeling

description: Data from DEM-LBM simulations of round sediment particles and continuum models:-single_sphere: single sphere tests of DEM-LBM for validation-flume: DEM-LBM flume tests, compared with the corresponding experiments-wide_wall_free: DEM-LBM simulations, wide wall free cases-continuum: continuum modeling results-fluid_bc: pure fluid LBM tests to validate the boundary condition for the flume tests<br>
DOI: 10.18739/a2k35mf8h
title: Radiocarbon dates, nitrogen, and carbon stable isotope data for various Equid bones collected in Alaska, 2015-2019

description: This data package is associated with the NSF Award # 1417036. Collaborative Research: Land Bridges, Ice-Free Corridors, and Biome Shifts: Impacts on the Evolution and Extinction of Horses in Ice-Age Beringia. This study asks: How important was connectivity among populations of large arctic mammal species for maintaining genetic diversity, influencing evolutionary change, and mitigating extinction risk? What types of barriers affected this connectivity, and how permeable were these barriers to gene flow? This study looks into how caballine horses, that inhabited ice-age Beringia (the biogeographic connector between Asia and North America), were affected by changes involving three different biogeographic barriers/corridors (1. the Bering Strait/Bering Land Bridge, which controlled dispersal and gene flow between Eurasia and Alaska; 2. the Ice-Free Corridor, which controlled gene flow between the Yukon and the Lower 48 States; and 3. biome shifts that periodically disrupted the spatial continuity of the Mammoth-Steppe, the unique ecosystem that stretched from France to the Yukon during the ice ages) during the last 30,000 years of the ice age. The specimens are currently in the Earth Sciences Collection at the University of Alaska Fairbanks Museum and are being curated by Pamela Groves and Daniel H. Mann. Each bone was sub-sampled for ancient DNA extraction, and sub-samples are currently in the collection of Paleogenomics lab UC Santa Cruz, curated by Alisa Vershinina.
DOI: 10.18739/a25x25d9k
title: In situ Magnesium/Calcium (Mg/Ca) and oxygen isotope (d18O) measurements in Neogloboquadrina pachyderma shells collected in 1999 by a MultiNet tow from different depth intervals in the Fram Strait

description: This dataset includes chemical and isotopic measurements on shells of the planktic foraminifera Neogloboquadrina pachyderma sinistral, collected by plankton tows (MultiNet) from eight stations across the Fram Strait (sites ARK XV/2 77-84). The sampled depth intervals are 0-50 meters (m), 50-100 m, and 100-200 m. Individual shells were analyzed in situ for their magnesium/calcium (Mg/Ca) ratios by Laser Ablation Inductively Coupled Mass Spectrometry (LA-ICP-MS), and for their stable oxygen isotope composition (d18O) by secondary ion mass spectrometry (SIMS). In addition, pooled shells were analyzed for d18O by acid-digestion isotope ratio mass spectrometry (IRMS). The purpose of this project was to determine the Mg/Ca:temperature sensitivity of the lamellar calcite (also called ontogenetic calcite) of N. pachyderma shells. Reference temperatures for the depth intervals sampled by MultiNet are available from parallel measurements using a conductivity temperature depth probe (CTD). A second objective of this project was to gain new insights into the d18O-temperature relationship of N. pachyderma by using two different analytical techniques (SIMS and IRMS). Corresponding publication: Livsey, C.M., Kozdon, R., Bauch, D., Brummer, G.-J.A., Jonkers, L., Orland, I., Hill, T.M., Spero, H.J., 2020. High-resolution Mg/Ca and d18O patterns in modern Neogloboquadrina pachyderma from the Fram Strait and Irminger Sea. Paleoceanography and Paleoclimatology, 35(9): e2020PA003969.doi:10.18739/A2319S316.
DOI: 10.5517/ccdc.csd.cc242spq
title: CCDC 1968893: Experimental Crystal Structure Determination

description: Related Article: Wenjia Hao, Bo Jin, Tao Huang, Jinhao Zhang, Juan Shen, Peng Rufang|2021|J.Solid State Chem.|297|122001|doi:10.1016/j.jssc.2021.122001
DOI: 10.6084/m9.figshare.19330576
title: Silhouettes and Quasi Residual Plots for Neural Nets and Tree-based Classifiers

description: Classification by neural nets and by tree-based methods are powerful tools of machine learning. There exist interesting visualizations of the inner workings of these and other classifiers. Here we pursue a different goal, which is to visualize the <i>cases</i> being classified, either in training data or in test data. An important aspect is whether a case has been classified to its given class (label) or whether the classifier wants to assign it to a different class. This is reflected in the (conditional and posterior) <i>probability of the alternative class</i> (PAC). A high PAC indicates label bias, that is, the possibility that the case was mislabeled. The PAC is used to construct a <i>silhouette plot</i> which is similar in spirit to the silhouette plot for cluster analysis. The average silhouette width can be used to compare different classifications of the same dataset. We will also draw <i>quasi residual plots</i> of the PAC versus a data feature, which may lead to more insight in the data. One of these data features is how far each case lies from its given class. The graphical displays are illustrated and interpreted on datasets containing images, mixed features, and tweets. Supplementary materials for this article are available online.
DOI: 10.6084/m9.figshare.19330572
title: The <i>G</i>-Wishart Weighted Proposal Algorithm: Efficient Posterior Computation for Gaussian Graphical Models

description: Gaussian graphical models can capture complex dependency structures among variables. For such models, Bayesian inference is attractive as it provides principled ways to incorporate prior information and to quantify uncertainty through the posterior distribution. However, posterior computation under the conjugate <i>G</i>-Wishart prior distribution on the precision matrix is expensive for general nondecomposable graphs. We therefore propose a new Markov chain Monte Carlo (MCMC) method named the <i>G</i>-Wishart weighted proposal algorithm (WWA). WWA’s distinctive features include delayed acceptance MCMC, Gibbs updates for the precision matrix and an informed proposal distribution on the graph space that enables embarrassingly parallel computations. Compared to existing approaches, WWA reduces the frequency of the relatively expensive sampling from the <i>G</i>-Wishart distribution. This results in faster MCMC convergence, improved MCMC mixing and reduced computing time. Numerical studies on simulated and real data show that WWA provides a more efficient tool for posterior inference than competing state-of-the-art MCMC algorithms. Supplemental materials for the article are available online.
DOI: 10.6084/m9.figshare.19330576.v2
title: Silhouettes and Quasi Residual Plots for Neural Nets and Tree-based Classifiers

description: Classification by neural nets and by tree-based methods are powerful tools of machine learning. There exist interesting visualizations of the inner workings of these and other classifiers. Here we pursue a different goal, which is to visualize the <i>cases</i> being classified, either in training data or in test data. An important aspect is whether a case has been classified to its given class (label) or whether the classifier wants to assign it to a different class. This is reflected in the (conditional and posterior) <i>probability of the alternative class</i> (PAC). A high PAC indicates label bias, that is, the possibility that the case was mislabeled. The PAC is used to construct a <i>silhouette plot</i> which is similar in spirit to the silhouette plot for cluster analysis. The average silhouette width can be used to compare different classifications of the same dataset. We will also draw <i>quasi residual plots</i> of the PAC versus a data feature, which may lead to more insight in the data. One of these data features is how far each case lies from its given class. The graphical displays are illustrated and interpreted on datasets containing images, mixed features, and tweets. Supplementary materials for this article are available online.
DOI: 10.6084/m9.figshare.19330572.v1
title: The <i>G</i>-Wishart Weighted Proposal Algorithm: Efficient Posterior Computation for Gaussian Graphical Models

description: Gaussian graphical models can capture complex dependency structures among variables. For such models, Bayesian inference is attractive as it provides principled ways to incorporate prior information and to quantify uncertainty through the posterior distribution. However, posterior computation under the conjugate <i>G</i>-Wishart prior distribution on the precision matrix is expensive for general nondecomposable graphs. We therefore propose a new Markov chain Monte Carlo (MCMC) method named the <i>G</i>-Wishart weighted proposal algorithm (WWA). WWA’s distinctive features include delayed acceptance MCMC, Gibbs updates for the precision matrix and an informed proposal distribution on the graph space that enables embarrassingly parallel computations. Compared to existing approaches, WWA reduces the frequency of the relatively expensive sampling from the <i>G</i>-Wishart distribution. This results in faster MCMC convergence, improved MCMC mixing and reduced computing time. Numerical studies on simulated and real data show that WWA provides a more efficient tool for posterior inference than competing state-of-the-art MCMC algorithms. Supplemental materials for the article are available online.
DOI: 10.6084/m9.figshare.19330576.v1
title: Silhouettes and quasi residual plots for neural nets and tree-based classifiers

description: Classification by neural nets and by tree-based methods are powerful tools of machine learning. There exist interesting visualizations of the inner workings of these and other classifiers. Here we pursue a different goal, which is to visualize the <i>cases</i> being classified, either in training data or in test data. An important aspect is whether a case has been classified to its given class (label) or whether the classifier wants to assign it to different class. This is reflected in the (conditional and posterior) <i>probability of the alternative class</i> (PAC). A high PAC indicates label bias, i.e. the possibility that the case was mislabeled. The PAC is used to construct a <i>silhouette plot</i> which is similar in spirit to the silhouette plot for cluster analysis (Rousseeuw, 1987). The average silhouette width can be used to compare different classifications of the same dataset. We will also draw <i>quasi residual plots</i> of the PAC versus a data feature, which may lead to more insight in the data. One of these data features is how far each case lies from its given class. The graphical displays are illustrated and interpreted on data sets containing images, mixed features, and tweets.
DOI: 10.6084/m9.figshare.19330480
title: Data Integration with Oracle Use of External Information from Heterogeneous Populations

description: It is common to have access to summary information from external studies. Such information can be useful for an internal study of interest to improve parameter estimation efficiency when incorporated. However, external studies may target populations different from the internal study, in which case an incorporation of the corresponding information may introduce estimation bias. We develop a penalized constrained maximum likelihood (PCML) method that simultaneously (a) selects the external studies whose information is useful for internal model fitting and (b) incorporates the corresponding information into internal estimation. The PCML estimator has the same efficiency as an oracle estimator that fully incorporates the useful external information alone. We establish estimation consistency, parametric rate of convergence, external information selection consistency, asymptotic normality, and oracle efficiency. An algorithm for implementation is provided, together with a data-adaptive tuning parameter selection. Supplemental materials are available online containing some details referred to throughout the article.
DOI: 10.6084/m9.figshare.19330480.v1
title: Data Integration with Oracle Use of External Information from Heterogeneous Populations

description: It is common to have access to summary information from external studies. Such information can be useful for an internal study of interest to improve parameter estimation efficiency when incorporated. However, external studies may target populations different from the internal study, in which case an incorporation of the corresponding information may introduce estimation bias. We develop a penalized constrained maximum likelihood (PCML) method that simultaneously (a) selects the external studies whose information is useful for internal model fitting and (b) incorporates the corresponding information into internal estimation. The PCML estimator has the same efficiency as an oracle estimator that fully incorporates the useful external information alone. We establish estimation consistency, parametric rate of convergence, external information selection consistency, asymptotic normality, and oracle efficiency. An algorithm for implementation is provided, together with a data-adaptive tuning parameter selection. Supplemental materials are available online containing some details referred to throughout the article.
DOI: 10.18739/a2gb1xj34
title: Carbon Isotopic Values of Alkanes Extracted from Paleosols

description: Dataset consists of compound specific carbon isotopic values of alkanes extracted from paleosols. Values represent the mean of duplicate measurements.
DOI: 10.18739/a26w96b0c
title: HOTRAX 2005 sediment core HLY0503-8JPC

description: This data set provides data for sediment core HLY0503-8JPC (Healy-Oden Trans-Arctic Expedition 2005 (HOTRAX 2005), 2nd leg), a key record for developing an up-to-date stratigraphy for Mid-Late Quaternary sediments in the western Arctic Ocean.
DOI: 10.18739/a2bn9x43n
title: Holocene sediment physical properties in four southwest Greenland lakes, 2016-2018

description: The climate and ice sheet history of Greenland are important to reconstruct for providing a longer-term context to ongoing changes. The goal of this award was to determine how sensitively past Arctic ice sheets responded to abrupt climate change on the order of global warming. To do this, the Principal Investigators (PIs) generated histories of ice sheet and glacier changes from Greenland and Arctic Canada spanning the last period in Earth history of major ice sheet demise (~12,000 to ~7000 years ago) using both lake sediment records and chronologies of moraines using cosmogenic nuclide exposure dating. The PIs and their graduate students visited remote parts of Greenland to collect geologic samples from features - still preserved on the landscapes today – that were generated when vast ice sheets retreated at the end of the last Ice Age. With these samples, the group reconstructed the timing of past ice sheet and climate changes. This dataset contains downcore analyses for sediment cores from four lakes in Southwest Greenland.
DOI: 10.18739/a2348gh6x
title: Studies Reconstructing Greenland Climate During the Eemian and Beyond

description: The primary goal of this collaborative project between three institutions is to understand the extent and evolution of the Greenland Ice Sheet (GrIS) during the Eemian period (roughly 130,000 to 115,000 years ago, the last major interglacial period in Earth's history) and the deglaciation immediately preceding it ("Termination 2"). The GrIS is an important agent influencing sea level, and Arctic and global climate, on multiple timescales. Its dynamics need to be understood in the context of past climate changes, but there is little information available about the footprint, volume, and elevation of the GrIS prior to the last ice age due to the absence of continuous ice core records prior to 123,000 years ago. During the Eemian, the GrIS was perhaps half its present size, contributing on the order of 3 m to "excess" sea level rise. Characterizing the evolution of the GrIS during glacial termination 2 and the Eemian would improve our understanding of its dynamics, and enhance our ability to make projections of sea level rise during the coming centuries. Older ice does exist at the bottoms of previously drilled ice cores, but the extraction of age and climate information from this older ice is hampered by the fact that it is stratigraphically disturbed and, in many cases, contaminated with soil or bedrock material. These investigators propose several novel methods to date this disturbed and/or "dirty" ice and to extract information on climate and ice sheet extent. The investigators will combine their new measurements and other available data to develop a more complete history of the GrIS during termination 2 and the Eemian. They will work with ice sheet modelers to investigate the constraints that the Eemian data provide for the models and improve their predictive capability. These efforts have the potential to improve our ability to predict the contribution of the GrIS to sea-level rise in the coming decades to centuries. Educational and outreach activities include the training of two graduate students, inclusion of this research in summer teacher enrichment programs, a lecture series for graduate students and postdocs, and communication of the results through the news media. PUBLICATIONS PRODUCED AS A RESULT OF THIS RESEARCH Blunier, T., M. L. Bender, B. Barnett, and J. C. Von Fisher. "Planetary fertility during the past 400 ka based on the triple isotope composition of O2 in trapped gases from the Vostok ice core," Climate of the Past, v.8, 2012, p. 1509. Rubino, M., D. M. Etheridge, C. M. Trudinger, C. E. Allison, M. O. Battle, R. L. Langenfelds, L. P. Steele, M. Curran, M. Bender, J. W. C. White, T. M. Jenk, T. Blunier, and R. J. Francey. "Rubino, M., D. M. Etheridge, C. M. Trudinger, C. E. Allison, M. O. Battle, R. L. Langenfelds, L. P. Steele, M. Curran, M. Bender, J. W. C. White, T. M. Jenk, T. Blunier, and R. J. Francey," Journal of Geophysical Research-Atmospheres, v.118, 2013, p. doi:10.10.