Recent Submissions

  • The Use of Online Health-Management Tools and Health Care Utilization among Older Americans 

    Liu, Darren; Yamashita, Takashi; Burston, Betty; Keene, Jennifer R (Oxford University Press, 2020-07-07)
    Background and Objectives The digital divide, or differences in access to technology, can have far-reaching consequences. This study identified disparities in access to online health-related technology. It then investigated ...
  • Sensor Techknowledge: Sensors for Process Development: A Practical Guide 

    Rao, Govind (UMBC Center for Advanced Sensor Technology and Department of Biochemical and Environmental Engineering, 2020-07-05)
  • Using radio triangulation to understand the origin of two subsequent type II radio bursts 

    Jebaraj, I. C.; Magdalenic, J.; Podladchikova, T.; Scolini, C.; Pomoell, J.; Veronig, A. M.; Dissauer, K.; Krupar, V.; Kilpua, E. K. J.; Poedts, S. (EDP sciences, 2020-05-07)
    Context. Eruptive events such as coronal mass ejections (CMEs) and flares accelerate particles and generate shock waves which can arrive at Earth and can disturb the magnetosphere. Understanding the association between ...
  • A possible case of sporadic aurora observed at Rio de Janeiro 

    Oliveira, Denny M.; Hayakawa, Hisashi; Bhaskar, Ankush; Zesta, Eftyhia; Vichare, Geeta (Springer Open, 2020-06-06)
    Being footprints of major magnetic storms and hence major solar eruptions, mid- to low-latitude aurorae have been one of the pathways to understand solar–terrestrial environments. However, it has been reported that aurorae ...
  • Tools for Living Democracy: Putting the CLDE Theory of Change into Practice 

    Hübler, Romy; Hoffman, David B.; Berger, Craig; Domagal-Goldman, Jennifer; King, Stephanie (Digital Commons, 2020)
    The Civic Learning and Democratic Engagement Theory of Change (Hoffman, Domagal-Goldman, King, & Robinson, 2018) addresses four key questions relating to vision/purpose, learning outcomes, pedagogy, and strategy for higher ...
  • Engineering Teacher Pedagogy: Using INSPIRES to Support Integration of Engineering Design in Science and Technology Classrooms 

    Singer, Jonathan; Rakes, Christopher; Ross, Julia; Williams, Tory; Krikorian, Jacqueline
    This Engineering Teacher Pedagogy project implements and assesses the promise of an extended professional development model coupled with curriculum enactment to develop teacher pedagogical skills for integrating engineering ...
  • A High Quality Educative Curriculum in Engineering Fosters Pedagogical Growth 

    Williams, Tory Holland; Krikorian, Jacqueline; Singer, Jonathan E; Rakes, Christopher R; Ross, Julie M (Elsevier, 2019)
    The Next Generation Science Standards call for the integration of engineering into mainstream science education, yet challenges arise for teachers unfamiliar with engineering-based pedagogy or concepts. The INSPIRES ...
  • Observations of deep convective influence on stratospheric water vapor and its isotopic composition 

    Hanisco, Thomas F.; Moyer, E. J.; Weinstock, E. M.; St. Clair, J. M.; Sayres, D. S.; Smith, J. B.; Lockwood, R.; Anderson, J. G.; Dessler, A. E.; Keutsch, F. N.; Spackman, J. R.; Read, W. G.; Bui, T. P. (AGU Pubication, 2007-02-27)
    In situ observations of H₂O and HDO in the midlatitude stratosphere are used to evaluate the role of convection in determining the stratospheric water budget. The observations show that water vapor in the overworld ...
  • Formation of large (≃100 μm) ice crystals near the tropical tropopause 

    Jensen, E. J.; Pfister, L.; Bui, T. V.; Lawson, P.; Baker, B.; Mo, Q.; Baumgardner, D.; Weinstock, E. M.; Smith, J. B.; Moyer, E. J.; Hanisco, T. F.; Sayres, D. S.; St. Clair, J. M.; Alexander, M. J.; Toon, O. B.; Smith, J. A. (Copernicus Publications, 2008-03-18)
    Recent high-altitude aircraft measurements with in situ imaging instruments indicated the presence of relatively large (≃100 μm length), thin (aspect ratios of ≃6:1 or larger) hexagonal plate ice crystals near the tropical ...
  • Chemistry of hydrogen oxide radicals (HOₓ) in the Arctic troposphere in spring 

    Mao, J.; Jacob, D. J.; Evans, M. J.; Olson, J. R.; Ren, X.; Brune, W. H.; St. Clair, J. M.; Crounse, J. D.; Spencer, K. M.; Beaver, M. R.; Wennberg, P. O.; Cubison, M. J.; Jimenez, J. L.; Fried, A.; Weibring, P.; Walega, J. G.; Hall, S. R.; Weinheimer, A. J.; Cohen, R. C.; Chen, G.; Crawford, J. H.; McNaughton, C.; Clarke, A. D.; Jaeglé, L.; Fisher, J. A.; Yantosca, R. M.; Sager, P. Le; Carouge, C. (Copernicus Publications, 2010-07-01)
    We use observations from the April 2008 NASA ARCTAS aircraft campaign to the North American Arctic, interpreted with a global 3-D chemical transport model (GEOS-Chem), to better understand the sources and cycling of hydrogen ...
  • Influence of convection on the water isotopic composition of the tropical tropopause layer and tropical stratosphere 

    Sayres, D. S.; Pfister, L.; Hanisco, T. F.; Moyer, E. J.; Smith, J. B.; St. Clair, J. M.; O'Brien, A. S.; Witinski, M. F.; Legg, M.; Anderson, J. G. (AGU Pubication, 2010-09-25)
    We present the first in situ measurements of HDO across the tropical tropopause, obtained by the integrated cavity output spectroscopy (ICOS) and Hoxotope water isotope instruments during the Costa Rica Aura Validation ...
  • Comparison of chemical characteristics of 495 biomass burning plumes intercepted by the NASA DC-8 aircraft during the ARCTAS/CARB-2008 field campaign 

    Hecobian, A.; Liu, Z.; Hennigan, C. J.; Huey, L. G.; Jimenez, J. L.; Cubison, M. J.; Vay, S.; Diskin, G. S.; Sachse, G. W.; Wisthaler, A.; Mikoviny, T.; Weinheimer, A. J.; Liao, J.; Knapp, D. J.; Wennberg, P. O.; Kürten, A.; Crounse, J. D.; St. Clair, J.; Wang1, Y.; Weber, R. J. (Copernicus Publications, 2011-12-22)
    his paper compares measurements of gaseous and particulate emissions from a wide range of biomass-burning plumes intercepted by the NASA DC-8 research aircraft during the three phases of the ARCTAS-2008 experiment: ARCTAS-A, ...
  • Global and regional effects of the photochemistry of CH₃O₂NO₂: evidence from ARCTAS 

    Browne, E. C.; Perring, A. E.; Wooldridge, P. J.; Apel, E.; Hall, S. R.; Huey, L. G.; Mao, J.; Spencer, K.M.; St. Clair, J.M.; Weinheimer, A. J.; Wisthaler, A.; Cohen, R. C. (Copernicus Publications, 2011-05-06)
    Using measurements from the NASA Arctic Research of the Composition of the Troposphere from Aircraft and Satellites (ARCTAS) experiment, we show that methyl peroxy nitrate (CH₃O₂NO₂) is present in concentrations of ~5–15 ...
  • Overview of the Focused Isoprene eXperiment at the California Institute of Technology (FIXCIT): mechanistic chamber studies on the oxidation of biogenic compounds 

    Nguyen, T. B.; Crounse, J. D.; Schwantes, R. H.; Teng, A. P.; Bates, K.H.; Zhang, X.; St. Clair, J. M.; Brune, W. H.; Tyndall, G. S.; Keutsch, F. N.; Seinfeld, H.; Wennberg, P. O. (Copernicus Publications, 2014-12-19)
    The Focused Isoprene eXperiment at the California Institute of Technology (FIXCIT) was a collaborative atmospheric chamber campaign that occurred during January 2014. FIXCIT is the laboratory component of a synergistic ...
  • Conversion of hydroperoxides to carbonyls in field and laboratory instrumentation: Observational bias in diagnosing pristine versus anthropogenically controlled atmospheric chemistry 

    Rivera‐Rios, J. C.; Nguyen, T. B.; Crounse, J.D.; Jud, W.; St. Clair, J. M.; Mikoviny, T.; Gilman, J. B.; Lerner, B.M.; Kaiser, J.B.; Gouw, J. de; Wisthaler, A.; Hansel, A.; Wennberg, P. O.; Seinfeld, J. H.; Keutsch, F. N. (AGU Pubication, 2014-11-17)
    Atmospheric volatile organic compound (VOC) oxidation mechanisms under pristine (rural/remote) and urban (anthropogenically‐influenced) conditions follow distinct pathways due to large differences in nitrogen oxide (NOx) ...
  • Emissions of organic carbon and methane from petroleum and dairy operations in California's San Joaquin Valley 

    Gentner, D. R.; Ford, T. B.; Guha, A.; Boulanger, K.; Brioude, J.; Angevine, W. M.; Gouw, J. A. de; Warneke, C.; Gilman, J. B.; Ryerson, T. B.; Peischl, J.; Meinardi, S.; Blake, D. R.; Atlas, E.; Lonneman, W. A.; Kleindienst, T. E.; Beaver, M. R.; St. Clair, J. M.; Wennberg, P. O.; VandenBoer, T. C.; Markovic, M. Z.; Murphy, J.G.; Harley, R. A.; Goldstein, A. H. (Copernicus Publications, 2014-05-21)
    Petroleum and dairy operations are prominent sources of gas-phase organic compounds in California's San Joaquin Valley. It is essential to understand the emissions and air quality impacts of these relatively understudied ...
  • An analysis of fast photochemistry over high northern latitudes during spring and summer using in-situ observations from ARCTAS and TOPSE 

    Olson, J. R.; Crawford, J. H.; Brune, W.; Mao, J.; Ren, X.; Fried, A.; Anderson, B.; Apel, E.; Beaver, M.; Blake, D.; Chen, G.; Crounse, J.; Dibb, J.; Diskin, G.; Hall, S. R.; Huey, L. G.; Knapp, D.; Richter, D.; Riemer, D.; St. Clair, J.; Ullmann, K.; Walega, J.; Weibring, P.; Weinheimer, A.; Wennberg, P.; Wisthaler, A. (Copernicus Publications, 2012-08-01)
    Observations of chemical constituents and meteorological quantities obtained during the two Arctic phases of the airborne campaign ARCTAS (Arctic Research of the Composition of the Troposphere from Aircraft and Satellites) ...
  • Importance of biogenic precursors to the budget of organic nitrates: observations of multifunctional organic nitrates by CIMS and TD-LIF during BEARPEX 2009 

    Beaver, M.R.; St. Clair, J. M.; Paulot, F.; Spencer, K.M.; Crounse, J.D.; LaFranchi, B. W.; Min, K.E.; Pusede, S. E.; Wooldridge, P. J.; Schade, G. W.; Park, C.; Cohen, R. C.; Wennberg, P. O. (Copernicus Publications, 2012-07-03)
    Alkyl and multifunctional organic nitrates, molecules of the chemical form RONO₂, are products of chain terminating reactions in the tropospheric HOₓ and NOₓ catalytic cycles and thereby impact ozone formation locally. ...
  • Impact of the deep convection of isoprene and other reactive trace species on radicals and ozone in the upper troposphere 

    Apel, E. C.; Olson, J. R.; Crawford, J. H.; Hornbrook, R. S.; Hills, A. J.; Cantrell, C. A.; Emmons, L. K.; Knapp, D. J.; Hall, S.; Mauldin, R. L.; Weinheimer, A. J.; Fried, A.; Blake, D. R.; Crounse, J. D.; St. Clair, J. M.; Wennberg, P. O.; Diskin, G. S.; Fuelberg, H. E.; Wisthaler, A.; Mikoviny, T.; Brune, W.; Riemer, D. D. (Copernicus Publications, 2012-01-27)
    Observations of a comprehensive suite of inorganic and organic trace gases, including non-methane hydrocarbons (NMHCs), halogenated organics and oxygenated volatile organic compounds (OVOCs), obtained from the NASA DC-8 ...
  • Quantification of hydroxyacetone and glycolaldehyde using chemical ionization mass spectrometry 

    St. Clair, J. M.; Spencer, K. M.; Beaver, M.R.; Crounse, J.D.; Paulot, F.; Wennberg, P. O. (Copernicus Publications, 2014-04-30)
    Chemical ionization mass spectrometry (CIMS) enables online, rapid, in situ detection and quantification of hydroxyacetone and glycolaldehyde. Two different CIMS approaches are demonstrated employing the strengths of single ...

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