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61. Evidence for metabolic diversity in Meso-Neoproterozoic stromatolites (Vazante Group, Brazil)

Author

Callefo, Flavia, primary, Ricardi-Branco, Fresia, additional, Alves Forancelli Pacheco, Mírian Liza, additional, Cardoso, Alexandre Ribeiro, additional, Noffke, Nora, additional, de Carvalho Teixeira, Verônica, additional, Neckel, Itamar Tomio, additional, Maldanis, Lara, additional, Bullock, Emma, additional, Bower, Dina, additional, Moreira Silva, Adalene, additional, Ferreira Sanchez, Dario, additional, Rodrigues, Fabio, additional, and Galante, Douglas, additional

Published
2022
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62. Dissolved Radium from Kolyma (Russia), Ellice (Canada), and Kodiak Island (USA) Rivers

Author

Charette, Matthew A., Bullock, Emma J., Charette, Matthew A., and Bullock, Emma J.

Abstract

Dataset: Minor Arctic Rivers - Dissolved Radium, This dataset reports concentrations of dissolved Radium from Kolyma (Russia), Ellice (Canada), and Kodiak Island (USA) Rivers from samples collected from June to September 2019. For a complete list of measurements, refer to the full dataset description in the supplemental file 'Dataset_description.pdf'. The most current version of this dataset is available at: https://www.bco-dmo.org/dataset/878527, NSF Division of Ocean Sciences (NSF OCE) OCE-1736277

Published
2022

64. Elemental Compositions of Comet 81p/Wild 2 Samples Collected by Stardust

Author

Flynn, George J., Bleuet, Pierre, Borg, Janet, Bradley, John P., Brenker, Frank E., Brennan, Sean, Bridges, John, Brownlee, Don E., Bullock, Emma S., Burghammer, Manfred, Clark, Benton C., Dai, Zu Rong, Daghlian, Charles P., Djouadi, Zahia, Fakra, Sirine, Ferroir, Tristan, Floss, Christine, Franchi, Ian A., Gainsforth, Zack, Gallien, Jean-Paul, Gillet, Philippe, Grant, Patrick G., Graham, Giles A., Green, Simon F., Grossemy, Faustine, Heck, Philipp R., Herzog, Gregory F., Hoppe, Peter, Hörz, Friedrich, Huth, Joachim, Ignatyev, Konstantin, Ishii, Hope A., Janssens, Koen, Joswiak, David, Kearsley, Anton T., Khodja, Hicham, Lanzirotti, Antonio, Leitner, Jan, Lemelle, Laurence, Leroux, Hugues, Luening, Katharina, MacPherson, Glenn J., Marhas, Kuljeet K., Marcus, Matthew A., Matrajt, Graciela, Nakamura, Tomoki, Nakamura-Messenger, Keiko, Nakano, Tsukasa, Newville, Matthew, Papanastassiou, Dimitri A., Pianetta, Piero, Rao, William, Riekel, Christian, Rietmeijer, Frans J. M., Rost, Detlef, Schwandt, Craig S., See, Thomas H., Sheffield-Parker, Julie, Simionovici, Alexandre, Sitnitsky, Ilona, Snead, Christopher J., Stadermann, Frank J., Stephan, Thomas, Stroud, Rhonda M., Susini, Jean, Suzuki, Yoshio, Sutton, Stephen R., Taylor, Susan, Teslich, Nick, Troadec, D., Tsou, Peter, Tsuchiyama, Akira, Uesugi, Kentaro, Vekemans, Bart, Vicenzi, Edward P., Vincze, Laszlo, Westphal, Andrew J., Wozniakiewicz, Penelope, Zinner, Ernst, and Zolensky, Michael E.

Published
2006
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65. Incorporating previously neglected excess oxygen associated with ferric iron in matrix corrections of microprobe data from cubic and rhombohedral Fe-Ti oxides.

Author

Dungan, Michael A., Donovan, John J., Locock, Andrew J., and Bullock, Emma S.

Subjects
IRON, ELECTRON probe microanalysis, LIGHT elements, OXYGEN, OXIDATION states, OXIDES
Abstract

Estimates of the oxidation states of magmas are important to current investigations of the geochemical characteristics of their source regions and of evolved magmatic series created during differentiation. One means of achieving such estimates is to capitalize on compositions of coexisting cubic and rhombohedral Fe-Ti oxides determined by electron microprobe. A combination of experimental calibration points and thermodynamic modeling provides a basis for translating such compositions into T-ƒO2 values. This has been done until recently by estimating Fe3+/ΣFe on the basis of charge balance and stoichiometry by the method of Droop (1987), after matrix corrections of X-ray intensity data have been performed, as EPMA cannot be used routinely to distinguish different elemental valence states, much less accurately quantify abundances of Fe3+ and Fe2+. The traditional approach of undertaking post-data-reduction calculations falls short of attaining the best possible quantitative results. The tactical choice of not accounting for light elements that have not been explicitly analyzed prior to matrix corrections of X-ray intensity data leads to systematic errors in reported oxide abundances for measured elements. This article addresses one such issue, the oxygen associated with Fe3+ (hereafter "excess oxygen"), on the basis of coexisting Fe-Ti oxides from Andean lavas. A new software routine in probe for EPMA (PFE) uses an iterative calculation scheme to calculate amounts of excess oxygen that would not be considered if all iron were assumed to be ferrous and then applies this excess oxygen during matrix corrections. The PFE approach reveals that Fe-concentrations have been underestimated, universally, in these minerals because O atoms absorb FeKα radiation: discrepancies increase as total Fe and Fe3+/Fe2+, hence excess oxygen, increase. Analyses of the most Fe-rich cubic oxide compositions in this data set have ~6 wt% excess oxygen and ~1 wt% more FeO+Fe2O3 than would be reported without incorporating the impact of excess oxygen in matrix corrections. Minor to negligible differences in other elements are also observed. These effects are not because excess oxygen is directly attributed to these elements, although some may be present in multiple valence states, as matrix corrections are undertaken on the basis of the conventional assumptions that they occur as Cr3+, V3+, Mn2+, Mg2+, Ca2+, and Si4+. Rather, variably small increases in total Fe propagate through the matrix corrections for other elements, and these differences may be recorded as minor increases or decreases in some concentrations, depending on the particular element and the amount of change in Fe-concentration. Fe3+/ΣFe in analyses produced with the PFE routine are essentially identical to those determined in the traditional mode, as cation proportions calculated on the basis of charge balance and stoichiometry, with the method of Droop (1987), is a necessary step. The new method: (1) provides more accurate concentrations, mainly for Fe and Ti; (2) is applicable to any mineral containing ferric iron (subject to stoichiometric constraints); (3) provides more accurate analytical totals, which can be advantageous for evaluating analytical quality; and (4) does not impact estimates of oxidation state. Oxygen fugacities and temperatures determined with the model of Ghiorso and Evans (2008) are essentially unchanged. [ABSTRACT FROM AUTHOR]

Published
2023
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70. Characterizing Fe sources on the Alaska Margin and tracing their influence through the North Pacific along the GEOTRACES GP15 section

Author

Sieber, Matthias, primary, Lanning, Nathan, additional, Bullock, Emma, additional, Kong, Kyeong Pil, additional, Lee, Jong-Mi, additional, Mateos, Katherine, additional, Laubach, Allison, additional, Bian, Xiaopeng, additional, Yang, Shun-Chung, additional, Weiss, Gabrielle, additional, Hult, Mikael, additional, Henderson, Paul, additional, Le Roy, Emilie, additional, Hatta, Mariko, additional, Moore, Willard, additional, Charette, Matthew, additional, Lam, Phoebe, additional, Fitzsimmons, Jessica, additional, John, Seth, additional, and Conway, Tim, additional

Published
2022
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71. Best practices for the use of meteorite names in publications

Author

Heck, Philipp R., Herd, Christopher, Grossman, Jeffrey N., Badjukov, Dmitry, Bouvier, Audrey, Bullock, Emma, Chennaoui-Aoudjehane, Hasnaa, Debaille, Vinciane, Dunn, Tasha L., Ebel, Denton S., Ferriere, Ludovic, Garvie, Laurence, Gattacceca, Jerome, Gounelle, Matthieu, Herd, Richard, Ireland, Trevor, Jacquet, Emmanuel, Macke, Robert J., McCoy, Tim, McCubbin, Francis M., Mikouchi, Takashi, Metzler, Knut, Roskosz, Mathieu, Smith, Caroline, Wadhwa, Meenakshi, Welzenbach-Fries, Linda, Yamaguchi, Akira, Zeigler, Ryan A., Zolensky, Michael, Yada, Toru, NASA Headquarters, Laboratoire de Sciences de la Terre (LST), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École normale supérieure - Lyon (ENS Lyon), American Museum of Natural History, American Museum of Natural History (AMNH), Natural History Museum [Vienna] (NHM), Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Collège de France (CdF (institution))-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Recherche Agronomique (INRA), Institut de minéralogie, de physique des matériaux et de cosmochimie (IMPMC), Muséum national d'Histoire naturelle (MNHN)-Institut de recherche pour le développement [IRD] : UR206-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Australian National University (ANU), Department of Earth and Planetary Science [Tokyo], Graduate School of Science [Tokyo], The University of Tokyo (UTokyo)-The University of Tokyo (UTokyo), Institut für Planetologie [Münster], Westfälische Wilhelms-Universität Münster (WWU), Centre de Recherches Pétrographiques et Géochimiques (CRPG), Institut national des sciences de l'Univers (INSU - CNRS)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS), Center for Meteorite Studies [Tempe], Arizona State University [Tempe] (ASU), National Institute of Polar Research [Tokyo] (NiPR), Astromaterials Research and Exploration Science (ARES), NASA Johnson Space Center (JSC), NASA-NASA, Field Museum of Natural History [Chicago, USA], University of Chicago, Department of Earth and Atmospheric Sciences [Edmonton], University of Alberta, Vernadsky Institute of Geochemistry and Analytical Chemistry (GEOKHI), Russian Academy of Sciences [Moscow] (RAS), Bavarian Research Institute of Experimental Geochemistry and Geophysics (Bayerisches Geoinstitut), Universität Bayreuth, Carnegie Institution for Science, Department of Earth Sciences [Casablanca], Faculté des Sciences Aïn Chock [Casablanca] (FSAC), Université Hassan II [Casablanca] (UH2MC)-Université Hassan II [Casablanca] (UH2MC), Laboratoire Géochimie, Traçage Isotopique, Minéral et élémentaire - G-Time (Bruxelles, Belgium), Colby College, Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Retired, Research School of Earth Sciences [Canberra] (RSES), Specola Vaticana/Vatican Observatory, Department of Mineral Sciences [Washington], Smithsonian Institution, Westfälische Wilhelms-Universität Münster = University of Münster (WWU), The Natural History Museum [London] (NHM), School of Geographical and Earth Sciences [Univ Glasgow], University of Glasgow, Planetary Science Institute [Tucson] (PSI), Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency [Sagamihara] (JAXA), École normale supérieure - Lyon (ENS Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), The University of Tokyo (UTokyo), Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Collège de France (CdF)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Institut National de la Recherche Agronomique (INRA), Laboratoire de minéralogie du Muséum National d'Histoire Naturelle (LMMNHN), Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS), The University of Tokyo, and Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS)

Subjects
History, 010504 meteorology & atmospheric sciences, Best practice, [SDU.ASTR.EP]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP], Library science, Généralités, 010502 geochemistry & geophysics, 01 natural sciences, Sciences de la terre et du cosmos, Geophysics, Meteorite, Space and Planetary Science, ComputingMilieux_MISCELLANEOUS, 0105 earth and related environmental sciences
Abstract

This document contains suggestions for best practices by authors who refer to meteorites in publications. It can also be taken as a guide for publishers in establishing guidelines for authors. The following best practices are recommended in addition to acknowledging the loaning institution or loaning individual (unless required otherwise). The main motivations are to: help ensure that research on meteorites is reproducible, prevent confusion in the literature, and enhance tracking of specimens and related data., SCOPUS: le.j, info:eu-repo/semantics/published

Published
2019
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77. Correction to Loss and Isotopic Fractionation of Alkali Elements during Diffusion-Limited Evaporation from Molten Silicate: Theory and Experiments

Author

Zhang, Zhe J., primary, Nie, Nicole Xike, additional, Mendybaev, Ruslan A., additional, Liu, Ming-Chang, additional, Hu, Justin Jingya, additional, Hopp, Timo, additional, Alp, Esen E., additional, Lavina, Barbara, additional, Bullock, Emma S., additional, McKeegan, Kevin D., additional, and Dauphas, Nicolas, additional

Published
2021
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78. Pan-Canadian standards for severe asthma in electronic medical records

Author

Lougheed, M. Diane, primary, Morra, Alison, additional, Bullock, Emma, additional, Tregobov, Noah, additional, Barber, Dave, additional, Boulet, Louis-Philippe, additional, Dell, Sharon, additional, Ducharme, Francine M., additional, Ferrone, Madonna, additional, FitzGerald, J. Mark, additional, Gupta, Samir, additional, Licskai, Christopher, additional, Podgers, Delanya, additional, Nair, Parameswaran, additional, Radhakrishnan, Dhenuka, additional, Sadatsafavi, Mohsen, additional, Tamari, Itamar E., additional, To, Teresa, additional, Walker, Brandie, additional, Yang, Connie L., additional, and Lemiere, Catherine, additional

Published
2021
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80. The Meteoritical Bulletin, No. 109

Author

Gattacceca, Jérôme, primary, McCubbin, Francis M., additional, Grossman, Jeffrey, additional, Bouvier, Audrey, additional, Bullock, Emma, additional, Chennaoui Aoudjehane, Hasnaa, additional, Debaille, Vinciane, additional, D’Orazio, Massimo, additional, Komatsu, Mutsumi, additional, Miao, Bingkui, additional, Schrader, Devin L., additional, and Timothy Jull, A. J., additional

Published
2021
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81. Loss and Isotopic Fractionation of Alkali Elements during Diffusion-Limited Evaporation from Molten Silicate: Theory and Experiments

Author

Zhang, Zhe J., primary, Nie, Nicole Xike, additional, Mendybaev, Ruslan A., additional, Liu, Ming-Chang, additional, Hu, Justin Jingya, additional, Hopp, Timo, additional, Alp, Esen E., additional, Lavina, Barbara, additional, Bullock, Emma S., additional, McKeegan, Kevin D., additional, and Dauphas, Nicolas, additional

Published
2021
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88. Zintl Ions within Framework Channels: The Complex Structure and Low-Temperature Transport Properties of Na_4Ge_(13)

Author

Stefanoski, Stevce, Finkelstein, Gregory J., Ward, Matthew D., Zeng, Tao, Wei, Kaya, Bullock, Emma S., Beavers, Christine M., Liu, Hanyu, Nolas, George S., and Strobel, Timothy A.

Abstract

Single crystals of a complex Zintl compound with the composition Na_4Ge_(13) were synthesized for the first time using a high-pressure/high-temperature approach. Single-crystal diffraction of synchrotron radiation revealed a hexagonal crystal structure with P6/m space group symmetry that is composed of a three-dimensional sp^3 Ge framework punctuated by small and large channels along the crystallographic c axis. Na atoms are inside hexagonal prism-based Ge cages along the small channels, while the larger channels are occupied by layers of disordered sixfold Na rings, which are in turn filled by disordered [Ge_4]^(4–) tetrahedra. This compound is the same as “Na_(1–x)Ge_(3+z)” reported previously, but the availability of single crystals allowed for more complete structural determination with a formula unit best described as Na_4Ge_(12)(Ge_4)_(0.25). The compound is the first known example of a guest–host structure where discrete Zintl polyanions are confined inside the channels of a three-dimensional covalent framework. These features give rise to temperature-dependent disorder, as confirmed by first-principles calculations and physical properties measurements. The availability of single-crystal specimens allowed for measurement of the intrinsic low-temperature transport properties of this material and revealed its semiconductor behavior, which was corroborated by theoretical calculations.

Published
2018

89. How design features in digital math games support learning and mathematics connections

Author

Moyer-Packenham, Patricia S., primary, Lommatsch, Christina W., additional, Litster, Kristy, additional, Ashby, Jill, additional, Bullock, Emma K., additional, Roxburgh, Allison L., additional, Shumway, Jessica F., additional, Speed, Emily, additional, Covington, Benjamin, additional, Hartmann, Christine, additional, Clarke-Midura, Jody, additional, Skaria, Joel, additional, Westenskow, Arla, additional, MacDonald, Beth, additional, Symanzik, Jürgen, additional, and Jordan, Kerry, additional

Published
2019
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93. An Explanatory Sequential Mixed Methods Study of the School Leaders��� Role in Students��� Mathematics Achievement Through the Lens of Complexity Theory

Author

Bullock, Emma P.

Subjects
Curriculum and Instruction, school leaders, Teacher Education and Professional Development, ComputingMilieux_COMPUTERSANDEDUCATION, complexity theory, mathematics achievement
Abstract

Student achievement in the K-12 mathematics classroom is of concern to parents, teachers, and community leaders as complex modern technological innovations call for higher proficiency in problem solving and mathematically creative minds are necessary to fill the vital, higher-paying jobs of today and the future. School leaders are expected to make decisions that will measurably, and in some cases, dramatically, improve student achievement in mathematics. However, school leaders do not make decisions in isolation; rather, they make decisions as part of a complex adaptive system (CAS). There is limited research concerning content-specific school leadership and its effects on student achievement, particularly through the lens of complexity theory. This study focuses on the relationships between students’ mathematics achievement and the characteristics of school leaders, looks at the influences affecting the decisions and actions being made by school leaders, and then seeks to understand how a school leaders’ decisions and actions are associated with students’ mathematics achievement. A significant predictive model was found including evidence of interaction effects and multiplicative looping effects aligned with complexity theory. Distinctive patterns emerged between school leaders’ decisions and actions from schools who were performing higher than expected, about where expected, and lower than expected. Furthermore, result indicate that school leaders do play an indirect role in student mathematics achievement specifically through the ability to foster a shared vision of mathematics education in their respective schools.

Published
2017
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100. An examination of children's learning progression shifts while using touch screen virtual manipulative mathematics apps

Author

Watts, Christina M., primary, Moyer-Packenham, Patricia S., additional, Tucker, Stephen I., additional, Bullock, Emma P., additional, Shumway, Jessica F., additional, Westenskow, Arla, additional, Boyer-Thurgood, Jennifer, additional, Anderson-Pence, Katie, additional, Mahamane, Salif, additional, and Jordan, Kerry, additional

Published
2016
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