Results 41 to 50 of about 6,831 (268)

Surface fluxes of bromoform and dibromomethane over the tropical western Pacific inferred from airborne in situ measurements [PDF]

, 2017
We infer surface fluxes of bromoform (CHBr3) and dibromoform (CH2Br2) from aircraft observations over the western Pacific using a tagged version of the GEOS-Chem global 3-D atmospheric chemistry model and a maximum a posteriori inverse model.
Laura L. Pan, Feng, Liang, Harris, Neil R. P, S. J. Andrews, R. J. Salawitch, Pan, Laura L., Ross J. Salawitch, S. M. Schauffler, Sue M. Schauffler, Donets, Valeria, N. R. P. Harris, Butler, Robyn, Neil R. P. Harris, Harris, Neil R.P., Schauffler, Sue M., Schauffler, Sue M, Palmer, Paul I., Paul I. Palmer, P. I. Palmer, Harris, Neil R. P., Salawitch, Ross J., Carpenter, Lucy J, E. L. Atlas, Palmer, Paul I, L. Feng, L. L. Pan, Robyn Butler, Lucy J. Carpenter, Andrews, Stephen J, Elliot L. Atlas, Atlas, Elliot L, R. Butler, Pan, Laura L, Stephen J. Andrews, Valeria Donets, Carpenter, Lucy J., Andrews, Stephen J., Salawitch, Ross J, Atlas, Elliot L., V. Donets, Liang Feng, L. J. Carpenter   +41 more
core   +1 more source

Transducers Across Scales and Frequencies: A System‐Level Framework for Multiphysics Integration and Co‐Design

Advanced Materials Technologies, EarlyView.
Transducers convert physical signals into electrical and optical representations, yet each mechanism is bounded by intrinsic trade‐offs across bandwidth, sensitivity, speed, and energy. This review maps transduction mechanisms across physical scale and frequency, showing how heterogeneous integration and multiphysics co‐design transform isolated ...
Aolei Xu, Mengyao Xiao, Zhouli Sui, Yinpeng Wang, Daoye Zheng, Yuxin Liu, Luwei Wang, Huajun Liu, Chengkuo Lee   +8 more
wiley   +1 more source

Impact of oceanic circulation changes on atmospheric δ¹³ CO₂ [PDF]

, 2015
δ¹³ CO₂ measured in Antarctic ice cores provides constraints on oceanic and terrestrial carbon cycle processes linked with millennial-scale changes in atmospheric CO₂. However, the interpretation of δ¹³ CO₂ is not straight-forward.
Joos, F, Menviel, L., England, MH ; https://orcid.org/, Meissner, K., Menviel, L ; https://orcid.org/, England, M. H., Mouchet, A, Mouchet, Anne, Joos, F., Meissner, KJ ; https://orcid.org/, Mouchet, A., Meissner, K. J., England, M.   +12 more
core   +1 more source

Biological and physical controls in the Southern Ocean on past millennial-scale atmospheric CO2 changes [PDF]

Nature Communications, 2016
AbstractMillennial-scale climate changes during the last glacial period and deglaciation were accompanied by rapid changes in atmospheric CO2 that remain unexplained. While the role of the Southern Ocean as a 'control valve' on ocean–atmosphere CO2 exchange has been emphasized, the exact nature of this role, in particular the relative contributions of ...
Gottschalk, Julia, Skinner, Luke C., Lippold, Jörg, Vogel, Hendrik, Frank, Norbert, Jaccard, Samuel, Waelbroeck, Claire   +6 more
openaire   +10 more sources

Benchmarking Coaxial and Angular Optical Emission Spectroscopy With Recommendations for Reliable Compositional In Situ Monitoring During Laser Powder Bed Fusion

Advanced Materials Technologies, EarlyView.
ABSTRACT Real‐time insight into local chemistry is critical for reliable part quality in additive manufacturing, especially laser powder bed fusion (PBF‑LB/M), where rapid thermal cycles and localized evaporation can undermine part performance. Optical emission spectroscopy (OES) offers non‑intrusive, in situ plume monitoring, but detection geometry ...
Philipp Gabriel, Bastian Jülich, Anna Rosa Ziefuss, Florian Eibl, Stephan Barcikowski   +4 more
wiley   +1 more source

Tunable‐Threshold UV Dosimetry With Programmable Luminescent Tags via Oxygen‐Mediated Room‐Temperature Phosphorescence

Advanced Materials Technologies, EarlyView.
A fully organic UV threshold dosimeter is developed by exploiting the oxygen‐sensitive room‐temperature phosphorescence of a purely organic emitter in a polymer matrix. Upon reaching a specific cumulative UV dose, photochemical oxygen depletion triggers a sharp, high‐contrast emission.
Tim Achenbach, Paul‐Anton Will, Karl Sebastian Schellhammer, Sebastian Reineke   +3 more
wiley   +1 more source

Atmospheric three-dimensional inverse modeling of regional industrial emissions and global oceanic uptake of carbon tetrachloride [PDF]

, 2010
Carbon tetrachloride (CCl4) has substantial stratospheric ozone depletion potential and its consumption is controlled under the Montreal Protocol and its amendments.
Wang, R. H. J., L. W. Porter, Fraser, P. J., Xiao, X., X. Xiao, P. K. Salameh, Elkins, J. W., L. P. Steele, A. Golombek, O'Doherty, Simon, Dutton, G. S., Krummel, P. B., G. S. Dutton, P. B. Krummel, Weiss, R. F., Hall, B. D., Prinn, R. G., Steele, L. P., P. G. Simmonds, Simmonds, P. G., R. F. Weiss, B. R. Miller, R. H. J. Wang, Butler, J. H., Prinn, Ronald G, S. O'Doherty, Golombek, A., Miller, Benjamin R., D. M. Cunnold, C. M. Harth, P. J. Fraser, Salameh, P. K., Harth, C. M., Miller, B. R., J. H. Butler, J. W. Elkins, O'Doherty, S., B. D. Hall, S. O'Doherty, Golombek, Amram, R. G. Prinn, Cunnold, D. M., Porter, L. W.   +42 more
core   +1 more source

Luminescence and Photochromism in Lanthanide‐Doped Hackmanites

Advanced Optical Materials, EarlyView.
Lanthanide‐doped lithium hackmanite derivatives are prepared utilizing a doped LiAlSiO4 precursor to modify luminescent and photochromic properties. Upon UV excitation, europium doping results in green Eu2+ persistent luminescence from shallow traps. Contrarily, samarium doping induces unusual near‐infrared photochromism.
Joshua Baggott, Minnea Tuomisto, J. A. Gareth Williams, Sari Granroth, Ermei Mäkilä, Ari Väisänen, Jani O. Moilanen, Mika Lastusaari   +7 more
wiley   +1 more source

New Constraints on Terrestrial and Oceanic Sources of Atmospheric Methanol [PDF]

, 2010
We use a global 3-D chemical transport model (GEOS-Chem) to interpret new aircraft, surface, and oceanic observations of methanol in terms of the constraints that they place on the atmospheric methanol budget.
Williams, J., de Gouw, J.A., Millet, D.B., Goldstein, A.H., Custer, T.G., Jacob, Daniel, Singh, H.B., Sive, B.C., Talbot, R.W., Karl, T., Warneke, C.   +10 more
core   +1 more source

Naphthyridine‐Based Donor–Acceptor Boron Difluoride Complexes Targeting Red Emission in Organic Light‐Emitting Diodes

Advanced Optical Materials, EarlyView.
Four donor–acceptor boron difluoride complexes based on triphenylamine donor and a naphthyridine acceptor units were synthesized, studied, and applied as OLED emitters. They exhibit pronounced intramolecular charge transfer character, balanced charge transport properties, and tunable emission. Near‐unity PLQYs are achieved for selected compounds, while
Omar Lahna, Stepan Kutsiy, Dmytro Volyniuk, Roman Luboradzki, Elina Andresen, Ute Resch‐Genger, Juozas V. Grazulevicius, Pavlo Stakhira, Mykhaylo A. Potopnyk   +8 more
wiley   +1 more source