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11 results on '"Butterworth, Anna"'

1. Automatic detection of impact craters on Al foils from the Stardust interstellar dust collector using convolutional neural networks

Author

Jaeger, Logan, primary, Butterworth, Anna L., additional, Gainsforth, Zack, additional, Lettieri, Robert, additional, Zevin, Dan, additional, Ardizzone, Augusto, additional, Capraro, Michael, additional, Burchell, Mark, additional, Wozniakiewicz, Penny, additional, Ogliore, Ryan C., additional, De Gregorio, Bradley T., additional, Stroud, Rhonda M., additional, Westphal, Andrew J., additional, and Brownlee, Donald, additional

Published
2021
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2. Automatic detection of impact craters on Al foils from the Stardust interstellar dust collector using convolutional neural networks

Author

Jaeger, Logan, Butterworth, Anna L., Gainsforth, Zack, Lettieri, Robert, Zevin, Daniel, Ardizzone, Augusto, Capraro, Michael, Burchell, Mark J., Wozniakiewicz, Penelope J., Ogliore, Ryan, De Gregorio, Bradley T., Stroud, Rhonda M., Westphal, Andrew J., Jaeger, Logan, Butterworth, Anna L., Gainsforth, Zack, Lettieri, Robert, Zevin, Daniel, Ardizzone, Augusto, Capraro, Michael, Burchell, Mark J., Wozniakiewicz, Penelope J., Ogliore, Ryan, De Gregorio, Bradley T., Stroud, Rhonda M., and Westphal, Andrew J.

Abstract

NASA’s Stardust mission utilized a sample collector composed of aerogel and aluminum foil to return cometary and interstellar particles to Earth. Analysis of the aluminum foil begins with locating craters produced by hypervelocity impacts of cometary and interstellar dust. Interstellar dust craters are typically less than one micrometer in size and are sparsely distributed, making them difficult to find. In this paper, we describe a convolutional neural network based on the VGG16 architecture that achieves high specificity and sensitivity in locating impact craters in the Stardust interstellar collector foils. We evaluate its implications for current and future analyses of Stardust samples

Published
2021

4. Feasibility of Enceladus plume biosignature analysis: Successful capture of organic ice particles in hypervelocity impacts

Author

New, James S., Kazemi, Bahar, Price, Mark C., Cole, Mike J., Spathis, Vassi, Mathies, Richard A., Butterworth, Anna L., New, James S., Kazemi, Bahar, Price, Mark C., Cole, Mike J., Spathis, Vassi, Mathies, Richard A., and Butterworth, Anna L.

Abstract

Enceladus is a compelling destination for astrobiological analyses due to the presence of simple and complex organic constituents in cryovolcanic plumes that jet from its subsurface ocean. Enceladus plume capture during a flyby or orbiter mission is an appealing method for obtaining pristine ocean samples for scientific studies of this organic content because of the high science return, reduced planetary protection challenges, and lower risk and expense compared to a landed mission. However, this mission profile requires sufficient amounts of plume material for sensitive analysis. To explore the feasibility and optimization of the required capture systems, light gas gun experiments were carried out to study organic ice particle impacts on indium surfaces. An organic fluorescent tracer dye, Pacific Blue™, was dissolved in borate buffer and frozen into saline ice projectiles. During acceleration, the ice projectile breaks up in flight into micron‐sized particles that impact the target. Quantitative fluorescence microscopic analysis of the targets demonstrated that under certain impact conditions, 10–50% of the entrained organic molecules were captured in over 25% of the particle impacts. Optimal organic capture was observed for small particles (d ~ 5–15 µm) with velocities ranging from 1 to 2 km s\(^{−1}\). Our results reveal how organic capture efficiency depends on impact velocity and particle size; capture increases as particles get smaller and as velocity is reduced. These results demonstrate the feasibility of collecting unmodified organic molecules from the Enceladus ice plume for sensitive analysis with modern in situ instrumentation such as microfluidic capillary electrophoresis (CE) analysis with ppb organic sensitivity.

Published
2020

6. Stardust Interstellar Preliminary Examination I: Identification of tracks in aerogel

Author

Westphal, Andrew J., primary, Anderson, David, additional, Butterworth, Anna L., additional, Frank, David R., additional, Lettieri, Robert, additional, Marchant, William, additional, Von Korff, Joshua, additional, Zevin, Daniel, additional, Ardizzone, Augusto, additional, Campanile, Antonella, additional, Capraro, Michael, additional, Courtney, Kevin, additional, Criswell, Mitchell N., additional, Crumpler, Dixon, additional, Cwik, Robert, additional, Gray, Fred Jacob, additional, Hudson, Bruce, additional, Imada, Guy, additional, Karr, Joel, additional, Wah, Lily Lau Wan, additional, Mazzucato, Michele, additional, Motta, Pier Giorgio, additional, Rigamonti, Carlo, additional, Spencer, Ronald C., additional, Woodrough, Stephens B., additional, Santoni, Irene Cimmino, additional, Sperry, Gerry, additional, Terry, Jean‐Noel, additional, Wordsworth, Naomi, additional, Yahnke, Tom, additional, Allen, Carlton, additional, Ansari, Asna, additional, Bajt, Saša, additional, Bastien, Ron K., additional, Bassim, Nabil, additional, Bechtel, Hans A., additional, Borg, Janet, additional, Brenker, Frank E., additional, Bridges, John, additional, Brownlee, Donald E., additional, Burchell, Mark, additional, Burghammer, Manfred, additional, Changela, Hitesh, additional, Cloetens, Peter, additional, Davis, Andrew M., additional, Doll, Ryan, additional, Floss, Christine, additional, Flynn, George, additional, Gainsforth, Zack, additional, Grün, Eberhard, additional, Heck, Philipp R., additional, Hillier, Jon K., additional, Hoppe, Peter, additional, Huth, Joachim, additional, Hvide, Brit, additional, Kearsley, Anton, additional, King, Ashley J., additional, Lai, Barry, additional, Leitner, Jan, additional, Lemelle, Laurence, additional, Leroux, Hugues, additional, Leonard, Ariel, additional, Nittler, Larry R., additional, Ogliore, Ryan, additional, Ong, Wei Ja, additional, Postberg, Frank, additional, Price, Mark C., additional, Sandford, Scott A., additional, Tresseras, Juan‐Angel Sans, additional, Schmitz, Sylvia, additional, Schoonjans, Tom, additional, Silversmit, Geert, additional, Simionovici, Alexandre S., additional, Solé, Vicente A., additional, Srama, Ralf, additional, Stephan, Thomas, additional, Sterken, Veerle J., additional, Stodolna, Julien, additional, Stroud, Rhonda M., additional, Sutton, Steven, additional, Trieloff, Mario, additional, Tsou, Peter, additional, Tsuchiyama, Akira, additional, Tyliszczak, Tolek, additional, Vekemans, Bart, additional, Vincze, Laszlo, additional, and Zolensky, Michael E., additional

Published
2014
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7. Stardust Interstellar Preliminary Examination XI: Identification and elemental analysis of impact craters on Al foils from the Stardust Interstellar Dust Collector

Author

Stroud, Rhonda M., primary, Allen, Carlton, additional, Ansari, Asna, additional, Anderson, David, additional, Bajt, Saša, additional, Bassim, Nabil, additional, Bastien, Ron S., additional, Bechtel, Hans A., additional, Borg, Janet, additional, Brenker, Frank E., additional, Bridges, John, additional, Brownlee, Donald E., additional, Burchell, Mark, additional, Burghammer, Manfred, additional, Butterworth, Anna L., additional, Changela, Hitesh, additional, Cloetens, Peter, additional, Davis, Andrew M., additional, Doll, Ryan, additional, Floss, Christine, additional, Flynn, George, additional, Frank, David R., additional, Gainsforth, Zack, additional, Grün, Eberhard, additional, Heck, Philipp R., additional, Hillier, Jon K., additional, Hoppe, Peter, additional, Huth, Joachim, additional, Hvide, Brit, additional, Kearsley, Anton, additional, King, Ashley J., additional, Kotula, Paul, additional, Lai, Barry, additional, Leitner, Jan, additional, Lemelle, Laurence, additional, Leroux, Hugues, additional, Leonard, Ariel, additional, Lettieri, Robert, additional, Marchant, William, additional, Nittler, Larry R., additional, Ogliore, Ryan, additional, Ong, Wei Jia, additional, Postberg, Frank, additional, Price, Mark C., additional, Sandford, Scott A., additional, Tresseras, Juan‐Angel Sans, additional, Schmitz, Sylvia, additional, Schoonjans, Tom, additional, Schreiber, Kate, additional, Silversmit, Geert, additional, Simionovici, Alexandre S., additional, Solé, Vicente A., additional, Srama, Ralf, additional, Stephan, Thomas, additional, Sterken, Veerle J., additional, Stodolna, Julien, additional, Sutton, Steven, additional, Trieloff, Mario, additional, Tsou, Peter, additional, Tsuchiyama, Akira, additional, Tyliszczak, Tolek, additional, Vekemans, Bart, additional, Vincze, Laszlo, additional, Westphal, Andrew J., additional, Von Korff, Joshua, additional, Zevin, Daniel, additional, and Zolensky, Michael E., additional

Published
2013
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8. Quantitative organic and light-element analysis of comet 81P/Wild 2 particles using C-, N-, and O-μ-XANES

Author

Cody, George D., primary, Ade, Harald, additional, Alexander, M. O'D., additional, Araki, Tohru, additional, Butterworth, Anna, additional, Fleckenstein, Holger, additional, Flynn, George, additional, Gilles, Mary K., additional, Jacobsen, Chris, additional, Kilcoyne, A. L. D., additional, Messenger, Keiko, additional, Sandford, Scott A., additional, Tyliszczak, Tolek, additional, Westphal, Andrew J., additional, Wirick, Susan, additional, and Yabuta, Hikaru, additional

Published
2008
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