Results 71 to 80 of about 76,360 (309)

Recent atmospheric Pb deposition at a rural site in southern Germany assessed using a peat core and snowpack, and comparison with other archives [PDF]

, 2005
In a peat bog from Black Forest, Southern Germany, the rate of atmospheric Pb accumulation was quantified using a peat core dated by 210Pb and 14C. The most recent Pb accumulation rate (2.5 mg m−2 y−1) is similar to that obtained from a snowpack on the ...
Le Roux, Gaël, Aubert, D., William Shotyk, Stille, Peter, Michael Krachler, Krachler, Michael, Shotyk, William, Kober, B., Bonani, Georges, Kober, Bernd, Dominique Aubert, Aubert, Dominique, Stille, P., Krachler, M., Shotyk, W., Le Roux, G., Andriy Cheburkin, Cheburkin, A., Peter Stille, Bernd Kober, Gaël Le Roux, Georges Bonani, Bonani, G., Cheburkin, Andriy   +23 more
core   +1 more source

Understanding the Stochastic Nature of Process Parameter Development of Blown Powder Laser Beam Directed Energy Deposition Additive Manufacturing of Pure Molybdenum

Advanced Engineering Materials, EarlyView.
Identified through the use of statistical design of experiments and metallographic investigation, this study exposes the stochastic origins of intergranular cracks in blown powder laser beam directed energy deposition additive manufacturing of pure molybdenum. It further demonstrates a successful crack mitigation approach with direct correlation to the
Nathaniel J. Lies, Daniel E. Driemeyer, Aaron P. Stebner   +2 more
wiley   +1 more source

Modeling the global atmospheric transport and deposition of mercury to the Great Lakes

Elementa: Science of the Anthropocene, 2016
Mercury contamination in the Great Lakes continues to have important public health and wildlife ecotoxicology impacts, and atmospheric deposition is a significant ongoing loading pathway.
Mark D. Cohen, Roland R. Draxler, Richard S. Artz, Pierrette Blanchard, Mae Sexauer Gustin, Young-Ji Han, Thomas M. Holsen, Daniel A. Jaffe, Paul Kelley, Hang Lei, Christopher P. Loughner, Winston T. Luke, Seth N. Lyman, David Niemi, Jozef M. Pacyna, Martin Pilote, Laurier Poissant, Dominique Ratte, Xinrong Ren, Frits Steenhuisen, Alexandra Steffen, Rob Tordon, Simon J. Wilson   +22 more
doaj   +1 more source

Global modelling of H₂ mixing ratios and isotopic compositions with the TM5 model

, 2011
The isotopic composition of molecular hydrogen (H2) contains independent information for constraining the global H2 budget. To explore this, we have implemented hydrogen sources and sinks, including their stable isotopic composition and isotope ...
Langenfelds, R.L., G. Pieterse, T. Röckmann, L. P. Steele, Pieterse, G., Afd Marine and Atmospheric Research, Marine and Atmospheric Research, Steele, L.P., Röckmann, T., Krummel, P.B., Sub Atmospheric physics and chemistry, M. C. Krol, P. B. Krummel, Krol, M.C., R. L. Langenfelds, A. M. Batenburg, Batenburg, A.M.   +16 more
core   +1 more source

Modelling of an industrial moving belt chemical vapour deposition reactor forming SiO2 films [PDF]

, 2005
In order to improve the efficiency of an industrial atmospheric pressure chemical vapour deposition (APCVD) moving belt reactor depositing silicon dioxide SiO2 films from tetraethoxysilane Si(OC2H5)4 (TEOS) andozone O3, a 2D simulation model based on the
Caussat, Brigitte, Nieto, Jean-Pierre, Jeannerot, Luc, B. Caussat, L. Jeannerot, J.P. Nieto   +5 more
core   +1 more source

Fatigue Crack Initiation and Growth in Nanocrystalline Ni at Multiple Length‐Scales

Advanced Engineering Materials, EarlyView.
Overview of miniaturized in situ SEM fatigue setup and resultant fatigue crack growth data for nanocrystalline Ni. The presented study focuses on the analysis of fatigue crack growth rate (FCGR) in focused ion beam‐notched microcantilevers prepared from nanocrystalline (NC) Ni as a model material.
Igor Moravcik, Alexander Jelinek, Markus Alfreider, Jutta Luksch, Anton Hohenwarter, Florian Schaefer, Christian Motz, Daniel Kiener   +7 more
wiley   +1 more source

Impacts of nitrogen deposition on vascular plants in Britain: an analysis of two national observation networks [PDF]

, 2011
Large areas of Great Britain currently have nitrogen (N) deposition at rates which exceed the thresholds above which there is risk of damage to sensitive components of the ecosystem (critical loads).
C. D. Preston, Walker, K.J., Henrys, P.A., Rowe, E. C., Emmett, B. A., S. M. Smart, Henrys, P. A., Maskell, L. C., Emmett, B.A., Rowe, E.C., L. C. Maskell, Preston, C.D., K. J. Walker, C. J. Stevens, Stevens, C.J., Smart, S.M., Preston, C. D., Gowing, D.J., Smart, S. M., P. A. Henrys, Stevens, C. J., E. C. Rowe, D. J. Gowing, A. Crowe, Maskell, L.C., Crowe, A., Walker, K. J., B. A. Emmett, Gowing, D. J.   +28 more
core   +1 more source

Creep‐Induced Microstructural Evolution in an A2‐B2 Superalloy

Advanced Engineering Materials, EarlyView.
A 27.3Ta‐27.3Mo‐27.3Ti‐8Cr‐10Al (at.%) refractory high‐entropy alloy with precipitation‐strengthened A2‐B2 microstructure was studied by creep tests at 1030°C, which demonstrate a transition in deformation mechanisms in the range of 100–150 MPa applied stress. This is associated with changes in dislocation–precipitate interactions. Relevant deformation
Liu Yang, Aparajita Pramanik, Sandipan Sen, Shubhashis Dixit, Marcel Muench, R. J. Vikram, Daniel Schliephake, Yolita M. Eggeler, Ankur Chauhan, Martin Heilmaier, Alexander Kauffmann   +10 more
wiley   +1 more source

Total Deposition 2015 Annual Map Summary [PDF]

, 2016
In October 2011, the National Atmospheric Deposition Program (NADP) Executive Committee formed the Total Deposition (TDEP) Science Committee. The mission of TDEP is to improve estimates of atmos-pheric deposition by advancing the science of measuring and
National Atmospheric Deposition Program
core  

Current Status and Challenges in Data Collection for Aerospace Coatings Deposited by Plasma Spraying

Advanced Engineering Materials, EarlyView.
An innovative approach has been integrated into the GRENAT project to optimize plasma spraying and coating performance. Raw materials are accelerated and melted in the plasma generated by torches, creating coatings. Monitoring sensors collect process data which are combined with ex situ characterization data.
Lila Randriamananjara, Vincent Rat, Quentin Dubreuil, Patrice Valorge, Simon Goutier, Alain Denoirjean, Olivier Messe, Céline Ruelle, Jean‐Philippe Poli   +8 more
wiley   +1 more source