Search Results - "Knopf, A"

Technical note: Adsorption and desorption equilibria from statistical thermodynamics and rates from transition state theory by Knopf, Daniel A, Ammann, Markus

“…Adsorption and desorption represent the initial processes of the interaction of gas species with the condensed phase. They have important implications for…”
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Multiphase OH oxidation kinetics of organic aerosol: The role of particle phase state and relative humidity by Slade, Jonathan H., Knopf, Daniel A.

“…Organic aerosol can exhibit different phase states in response to changes in relative humidity (RH), thereby influencing heterogeneous reaction rates with…”
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The Role of Organic Aerosol in Atmospheric Ice Nucleation: A Review by Knopf, Daniel A, Alpert, Peter A, Wang, Bingbing

“…Predicting the formation of ice in the atmosphere presents one of the great challenges in physical sciences with important implications for the chemistry and…”
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Log file‐based dose reconstruction and accumulation for 4D adaptive pencil beam scanned proton therapy in a clinical treatment planning system: Implementation and proof‐of‐concept by Meijers, A., Jakobi, A., Stützer, K., Guterres Marmitt, G., Both, S., Langendijk, J. A., Richter, C., Knopf, A.

“…Background and purpose Motion‐induced uncertainties hamper the clinical implementation of pencil beam scanning proton therapy (PBS‐PT). Prospective…”
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SP-0025: Intrafraction motion and proton beam scanning by Knopf, A

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Desorption lifetimes and activation energies influencing gas–surface interactions and multiphase chemical kinetics by Knopf, Daniel A, Ammann, Markus, Berkemeier, Thomas, Pöschl, Ulrich, Shiraiwa, Manabu

“…Adsorption and desorption of gases on liquid or solid substrates are involved in multiphase processes and heterogeneous chemical reactions. The desorption…”
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Comparative study of layered and volumetric rescanning for different scanning speeds of proton beam in liver patients by Bernatowicz, K, Lomax, A J, Knopf, A

“…In recent years, particle therapy has become a widely accepted form of cancer treatment and technological advances in beam delivery technology (i.e. pencil…”
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Frozen section biopsy for tumors of the submandibular triangle by Riemann, S, Knopf, A

“…Diagnosis and treatment of submandibular lesions is challenging. Carcinomas, which frequently occur, should be surgically removed with sufficient safety…”
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Heterogeneous OH oxidation of biomass burning organic aerosol surrogate compounds: assessment of volatilisation products and the role of OH concentration on the reactive uptake kinetics by Slade, Jonathan H, Knopf, Daniel A

“…The reactive uptake coefficients (γ) of OH by levoglucosan, abietic acid, and nitroguaiacol serving as surrogate compounds for biomass burning aerosol have…”
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Heterogeneous oxidation of amorphous organic aerosol surrogates by O3, NO3, and OH at typical tropospheric temperatures by Li, Jienan, rester, Seanna M, Knopf, Daniel A

“…Typical tropospheric temperatures render possible phase states of amorphous organic aerosol (OA) particles of solid, semisolid, and liquid. This will affect…”
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Tropospheric and stratospheric wildfire smoke profiling with lidar: mass, surface area, CCN, and INP retrieval by Ansmann, Albert, Ohneiser, Kevin, Mamouri, Rodanthi-Elisavet, Knopf, Daniel A, Veselovskii, Igor, Baars, Holger, Engelmann, Ronny, Foth, Andreas, Jimenez, Cristofer, Seifert, Patric, Barja, Boris

“…We present retrievals of tropospheric and stratospheric height profiles of particle mass, volume, surface area, and number concentrations in the case of…”
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Stimulation of ice nucleation by marine diatoms by Knopf, D. A, Alpert, P. A, Wang, B, Aller, J. Y

“…Atmospheric aerosol particles serve as nuclei for ice-crystal formation. As such, these particles are critical to the generation of cirrus clouds, which form…”
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Analysis of isothermal and cooling-rate-dependent immersion freezing by a unifying stochastic ice nucleation model by Alpert, Peter A, Knopf, Daniel A

“…Immersion freezing is an important ice nucleation pathway involved in the formation of cirrus and mixed-phase clouds. Laboratory immersion freezing experiments…”
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Online image guided tumour tracking with scanned proton beams: a comprehensive simulation study by Zhang, Ye, Knopf, A, Tanner, C, Lomax, A J

“…Tumour tracking with scanned particle beams potentially requires accurate 3D information on both tumour motion and related density variations. We have…”
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Microspectroscopic imaging and characterization of individually identified ice nucleating particles from a case field study by Knopf, D. A., Alpert, P. A., Wang, B., O'Brien, R. E., Kelly, S. T., Laskin, A., Gilles, M. K., Moffet, R. C.

“…The effect of anthropogenic and biogenic organic particles on atmospheric glaciation processes is poorly understood. We use an optical microscopy setup to…”
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Micro-spectroscopic and freezing characterization of ice-nucleating particles collected in the marine boundary layer in the eastern North Atlantic by Knopf, Daniel A, Charnawskas, Joseph C, Wang, Peiwen, Wong, Benny, Tomlin, Jay M, Jankowski, Kevin A, Fraund, Matthew, Veghte, Daniel P, China, Swarup, Laskin, Alexander, Moffet, Ryan C, Gilles, Mary K, Aller, Josephine Y, Marcus, Matthew A, Raveh-Rubin, Shira, Wang, Jian

“…Formation of atmospheric ice plays a crucial role in the microphysical evolution of mixed-phase and cirrus clouds and thus climate. How aerosol particles…”
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Australian wildfire smoke in the stratosphere: the decay phase in 2020/2021 and impact on ozone depletion by Ohneiser, Kevin, Ansmann, Albert, Kaifler, Bernd, Chudnovsky, Alexandra, Barja, Boris, Knopf, Daniel A, Kaifler, Natalie, Baars, Holger, Seifert, Patric, Villanueva, Diego, Jimenez, Cristofer, Radenz, Martin, Engelmann, Ronny, Veselovskii, Igor, Zamorano, Félix

“…Record-breaking wildfires raged in southeastern Australia in late December 2019 and early January 2020. Rather strong pyrocumulonimbus (pyroCb) convection…”
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The Prevalence of Precipitation From Polar Supercooled Clouds by Silber, Israel, Fridlind, Ann M, Verlinde, Johannes, Ackerman, Andrew S, Cesana, Gregory V, Knop, Daniel A.

“…Supercooled clouds substantially impact polar surface energy budgets, but large-scale models often underestimate their occurrence, which motivates accurately…”
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Morphology and mixing of black carbon particles collected in central California during the CARES field study by Moffet, Ryan C, O'Brien, Rachel E, Alpert, Peter A, Kelly, Stephen T, Pham, Don Q, Gilles, Mary K, Knopf, Daniel A, Laskin, Alexander

“…Aerosol absorption is strongly dependent on the internal heterogeneity (mixing state) and morphology of individual particles containing black carbon (BC) and…”
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Deep learning prediction of proton and photon dose distributions for paediatric abdominal tumours by Guerreiro, F., Seravalli, E., Janssens, G.O., Maduro, J.H., Knopf, A.C., Langendijk, J.A., Raaymakers, B.W., Kontaxis, C.

“…•Deep-learning networks for prediction of PBS and VMAT doses were established.•Relative errors between planned and predicted doses were minimal in the…”
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