Zobrazeno 1 - 10
of 3 483
pro vyhledávání: '"P. DeWald"'
Autor:
S. T. Andersen, M. R. McGillen, C. Xue, T. Seubert, P. Dewald, G. N. T. E. Türk, J. Schuladen, C. Denjean, J.-C. Etienne, O. Garrouste, M. Jamar, S. Harb, M. Cirtog, V. Michoud, M. Cazaunau, A. Bergé, C. Cantrell, S. Dusanter, B. Picquet-Varrault, A. Kukui, A. Mellouki, L. J. Carpenter, J. Lelieveld, J. N. Crowley
Publikováno v:
Atmospheric Chemistry and Physics, Vol 24, Pp 11603-11618 (2024)
The budget of reactive nitrogen species, which play a central role in atmospheric chemistry (e.g. in photochemical O3 production), is poorly understood in forested regions. In this study, through observations of NO, NO2, NOy, and O3 in the Rambouille
Externí odkaz:
https://doaj.org/article/b04053af0bd848c7954cc15d01196615
Autor:
P. Dewald, T. Seubert, S. T. Andersen, G. N. T. E. Türk, J. Schuladen, M. R. McGillen, C. Denjean, J.-C. Etienne, O. Garrouste, M. Jamar, S. Harb, M. Cirtog, V. Michoud, M. Cazaunau, A. Bergé, C. Cantrell, S. Dusanter, B. Picquet-Varrault, A. Kukui, C. Xue, A. Mellouki, J. Lelieveld, J. N. Crowley
Publikováno v:
Atmospheric Chemistry and Physics, Vol 24, Pp 8983-8997 (2024)
We present direct measurements of biogenic volatile organic compound (BVOC)-induced nitrate radical (NO3) reactivity (kVOC) through the diel cycle in the suburban, temperate forest of Rambouillet near Paris (France). The data were obtained in a 6-wee
Externí odkaz:
https://doaj.org/article/f4b2058d6683424482c46eb26b567804
Autor:
P. T. M. Carlsson, L. Vereecken, A. Novelli, F. Bernard, S. S. Brown, B. Brownwood, C. Cho, J. N. Crowley, P. Dewald, P. M. Edwards, N. Friedrich, J. L. Fry, M. Hallquist, L. Hantschke, T. Hohaus, S. Kang, J. Liebmann, A. W. Mayhew, T. Mentel, D. Reimer, F. Rohrer, J. Shenolikar, R. Tillmann, E. Tsiligiannis, R. Wu, A. Wahner, A. Kiendler-Scharr, H. Fuchs
Publikováno v:
Atmospheric Chemistry and Physics, Vol 23, Pp 3147-3180 (2023)
The gas-phase reaction of isoprene with the nitrate radical (NO3) was investigated in experiments in the outdoor SAPHIR chamber under atmospherically relevant conditions specifically with respect to the chemical lifetime and fate of nitrato-organic p
Externí odkaz:
https://doaj.org/article/7ed7fbd543a34975a2275c9fb7440cd8
Autor:
L. L. Röder, P. Dewald, C. M. Nussbaumer, J. Schuladen, J. N. Crowley, J. Lelieveld, H. Fischer
Publikováno v:
Atmospheric Measurement Techniques, Vol 16, Pp 1167-1178 (2023)
In this study, we explore the applications and limitations of sequential Monte Carlo (SMC) filters to field experiments in atmospheric chemistry. The proposed algorithm is simple, fast, versatile and returns a complete probability distribution. It co
Externí odkaz:
https://doaj.org/article/3772f584eb8e4251bdfd70a8497e976d
Autor:
P. Dewald, C. M. Nussbaumer, J. Schuladen, A. Ringsdorf, A. Edtbauer, H. Fischer, J. Williams, J. Lelieveld, J. N. Crowley
Publikováno v:
Atmospheric Chemistry and Physics, Vol 22, Pp 7051-7069 (2022)
The reactivity of NO3 plays an important role in modifying the fate of reactive nitrogen species at nighttime. High reactivity (e.g. towards unsaturated volatile organic compounds – VOCs) can lead to formation of organic nitrates and secondary orga
Externí odkaz:
https://doaj.org/article/4ee5cbe3b4654897a8faab81ae8a86e3
Publikováno v:
Atmospheric Measurement Techniques, Vol 14, Pp 5501-5519 (2021)
We present measurements of isoprene-derived organic nitrates (ISOP-NITs) generated in the reaction of isoprene with the nitrate radical (NO3) in a 1 m3 Teflon reaction chamber. Detection of ISOP-NITs is achieved via their thermal dissociation to nitr
Externí odkaz:
https://doaj.org/article/ed769a064619496e910d97e157d560c2
Publikováno v:
Journal of Advanced Joining Processes, Vol 5, Iss , Pp 100094- (2022)
High-strength steel sheets are used in the automotive industry to save weight. In particularly, in the chassis area, high-strength steels are constantly replacing the previously used strength classes of 440–590 MPa. In body in white construction, g
Externí odkaz:
https://doaj.org/article/40610ed20aa74c209df064f1ba0948e1
Autor:
Iaquinta, Sam, Amendt, Peter, Milovich, Jose, Dewald, Eduard, Divol, Laurent, Jones, Ogden, Suter, Larry, Wallace, Russel, Bingham, Robert, Glenzer, Siegfried, Gregori, Gianluca
On the path towards high-gain inertial confinement fusion ignition, foams are being considered to tamp the hohlraum wall-motion, and mitigate laser backscattering from Stimulated Raman Scattering (SRS) and Stimulated Brillouin Scattering (SBS). Here
Externí odkaz:
http://arxiv.org/abs/2406.03475
Autor:
P. Dewald, J. M. Liebmann, N. Friedrich, J. Shenolikar, J. Schuladen, F. Rohrer, D. Reimer, R. Tillmann, A. Novelli, C. Cho, K. Xu, R. Holzinger, F. Bernard, L. Zhou, W. Mellouki, S. S. Brown, H. Fuchs, J. Lelieveld, J. N. Crowley
Publikováno v:
Atmospheric Chemistry and Physics, Vol 20, Pp 10459-10475 (2020)
In a series of experiments in an atmospheric simulation chamber (SAPHIR,1 Forschungszentrum Jülich, Germany), NO3 reactivity (kNO3) resulting from the reaction of NO3 with isoprene and stable trace gases formed as products was measured directly usin
Externí odkaz:
https://doaj.org/article/0a9b383ac8004e569ec4c9418d4c5e1a
High Speed Neuromorphic Vision-Based Inspection of Countersinks in Automated Manufacturing Processes
Autor:
Salah, Mohammed, Ayyad, Abdulla, Ramadan, Mohammed, Abdulrahman, Yusra, Swart, Dewald, Abusafieh, Abdelqader, Seneviratne, Lakmal, Zweiri, Yahya
Countersink inspection is crucial in various automated assembly lines, especially in the aerospace and automotive sectors. Advancements in machine vision introduced automated robotic inspection of countersinks using laser scanners and monocular camer
Externí odkaz:
http://arxiv.org/abs/2304.04108