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252. Elastic and thermodynamic properties of asteroid Ryugu return samples

Author

Hu, Michael, primary, Lavina, Barbara, additional, Alp, Ercan, additional, Zhao, Jiyong, additional, Roskosz, Mathieu, additional, Beck, Pierre, additional, Viennet, Jean-Christophe, additional, Nakamura, Tomoki, additional, Amano, Kana, additional, Kikuiri, Mizuha, additional, Morita, Tomoyo, additional, Yurimoto, Hisayoshi, additional, Noguchi, Takaaki, additional, Okazaki, Ryuji, additional, Yabuta, Hikaru, additional, Naraoka, Hiroshi, additional, Sakamoto, Kanako, additional, Tachibana, Shogo, additional, Watanabe, Sei-ichiro, additional, and Tsuda, Yuichi, additional

Published
2022
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253. Comet 81p/Wild 2 under a Microscope

Author

Brownlee, Don, Tsou, Peter, Aléon, Jérôme, Alexander, Conel M. O'D., Araki, Tohru, Bajt, Sasa, Baratta, Giuseppe A., Bastien, Ron, Bland, Phil, Bleuet, Pierre, Borg, Janet, Bradley, John P., Brearley, Adrian, Brenker, F., Brennan, Sean, Bridges, John C., Browning, Nigel D., Brucato, John R., Bullock, E., Burchell, Mark J., Busemann, Henner, Butterworth, Anna, Chaussidon, Marc, Cheuvront, Allan, Chi, Miaofang, Cintala, Mark J., Clark, B. C., Clemett, Simon J., Cody, George, Colangeli, Luigi, Cooper, George, Cordier, Patrick, Daghlian, C., Dai, Zurong, D'Hendecourt, Louis, Djouadi, Zahia, Dominguez, Gerardo, Duxbury, Tom, Dworkin, Jason P., Ebel, Denton S., Economou, Thanasis E., Fakra, Sirine, Fairey, Sam A. J., Fallon, Stewart, Ferrini, Gianluca, Ferroir, T., Fleckenstein, Holger, Floss, Christine, Flynn, George, Franchi, Ian A., Fries, Marc, Gainsforth, Z., Gallien, J.-P., Genge, Matt, Gilles, Mary K., Gillet, Philipe, Gilmour, Jamie, Glavin, Daniel P., Gounelle, Matthieu, Grady, Monica M., Graham, Giles A., Grant, P. G., Green, Simon F., Grossemy, Faustine, Grossman, Lawrence, Grossman, Jeffrey N., Guan, Yunbin, Hagiya, Kenji, Harvey, Ralph, Heck, Philipp, Herzog, Gregory F., Hoppe, Peter, Hörz, Friedrich, Huth, Joachim, Hutcheon, Ian D., Ignatyev, Konstantin, Ishii, Hope, Ito, Motoo, Jacob, Damien, Jacobsen, Chris, Jacobsen, Stein, Jones, Steven, Joswiak, David, Jurewicz, Amy, Kearsley, Anton T., Keller, Lindsay P., Khodja, H., Kilcoyne, A. L. David, Kissel, Jochen, Krot, Alexander, Langenhorst, Falko, Lanzirotti, Antonio, Le, Loan, Leshin, Laurie A., Leitner, J., Lemelle, L., Leroux, Hugues, Liu, Ming-Chang, Leuning, K., Lyon, Ian, MacPherson, Glen, Marcus, Matthew A., Marhas, Kuljeet, Marty, Bernard, Matrajt, Graciela, McKeegan, Kevin, Meibom, Anders, Mennella, Vito, Messenger, Keiko, Messenger, Scott, Mikouchi, Takeshi, Mostefaoui, Smail, Nakamura, Tomoki, Nakano, T., Newville, M., Nittler, Larry R., Ohnishi, Ichiro, Ohsumi, Kazumasa, Okudaira, Kyoko, Papanastassiou, Dimitri A., Palma, Russ, Palumbo, Maria E., Pepin, Robert O., Perkins, David, Perronnet, Murielle, Pianetta, P., Rao, William, Rietmeijer, Frans J. M., Robert, François, Rost, D., Rotundi, Alessandra, Ryan, Robert, Sandford, Scott A., Schwandt, Craig S., See, Thomas H., Schlutter, Dennis, Sheffield-Parker, J., Simionovici, Alexandre, Simon, Steven, Sitnitsky, I., Snead, Christopher J., Spencer, Maegan K., Stadermann, Frank J., Steele, Andrew, Stephan, Thomas, Stroud, Rhonda, Susini, Jean, Sutton, S. R., Suzuki, Y., Taheri, Mitra, Taylor, Susan, Teslich, Nick, Tomeoka, Kazu, Tomioka, Naotaka, Toppani, Alice, Trigo-Rodríguez, Josep M., Troadec, David, Tsuchiyama, Akira, Tuzzolino, Anthony J., Tyliszczak, Tolek, Uesugi, K., Velbel, Michael, Vellenga, Joe, Vicenzi, E., Vincze, L., Warren, Jack, Weber, Iris, Weisberg, Mike, Westphal, Andrew J., Wirick, Sue, Wooden, Diane, Wopenka, Brigitte, Wozniakiewicz, Penelope, Wright, Ian, Yabuta, Hikaru, Yano, Hajime, Young, Edward D., Zare, Richard N., Zega, Thomas, Ziegler, Karen, Zimmerman, Laurent, Zinner, Ernst, and Zolensky, Michael

Published
2006
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254. Mineralogy and Petrology of Comet 81p/Wild 2 Nucleus Samples

Author

Zolensky, Michael E., Zega, Thomas J., Yano, Hajime, Wirick, Sue, Westphal, Andrew J., Weisberg, Mike K., Weber, Iris, Warren, Jack L., Velbel, Michael A., Tsuchiyama, Akira, Tsou, Peter, Toppani, Alice, Tomioka, Naotaka, Tomeoka, Kazushige, Teslich, Nick, Taheri, Mitra, Susini, Jean, Stroud, Rhonda, Stephan, Thomas, Stadermann, Frank J., Snead, Christopher J., Simon, Steven B., Simionovici, Alexandre, See, Thomas H., Robert, François, Rietmeijer, Frans J. M., Rao, William, Perronnet, Murielle C., Papanastassiou, Dimitri A., Okudaira, Kyoko, Ohsumi, Kazumasa, Ohnishi, Ichiro, Nakamura-Messenger, Keiko, Nakamura, Tomoki, Mostefaoui, Smail, Mikouchi, Takashi, Meibom, Anders, Matrajt, Graciela, Marcus, Matthew A., Leroux, Hugues, Lemelle, Laurence, Le, Loan, Lanzirotti, Antonio, Langenhorst, Falko, Krot, Alexander N., Keller, Lindsay P., Kearsley, Anton T., Joswiak, David, Jacob, Damien, Ishii, Hope, Harvey, Ralph, Hagiya, Kenji, Grossman, Lawrence, Grossman, Jeffrey N., Graham, Giles A., Gounelle, Matthieu, Gillet, Philippe, Genge, Matthew J., Flynn, George, Ferroir, Tristan, Fallon, Stewart, Ebel, Denton S., Dai, Zu Rong, Cordier, Patrick, Clark, Benton, Chi, Miaofang, Butterworth, Anna L., Brownlee, Donald E., Bridges, John C., Brennan, Sean, Brearley, Adrian, Bradley, John P., Bleuet, Pierre, Bland, Phil A., and Bastien, Ron

Published
2006
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255. Elemental Compositions of Comet 81p/Wild 2 Samples Collected by Stardust

Author

Flynn, George J., Bleuet, Pierre, Borg, Janet, Bradley, John P., Brenker, Frank E., Brennan, Sean, Bridges, John, Brownlee, Don E., Bullock, Emma S., Burghammer, Manfred, Clark, Benton C., Dai, Zu Rong, Daghlian, Charles P., Djouadi, Zahia, Fakra, Sirine, Ferroir, Tristan, Floss, Christine, Franchi, Ian A., Gainsforth, Zack, Gallien, Jean-Paul, Gillet, Philippe, Grant, Patrick G., Graham, Giles A., Green, Simon F., Grossemy, Faustine, Heck, Philipp R., Herzog, Gregory F., Hoppe, Peter, Hörz, Friedrich, Huth, Joachim, Ignatyev, Konstantin, Ishii, Hope A., Janssens, Koen, Joswiak, David, Kearsley, Anton T., Khodja, Hicham, Lanzirotti, Antonio, Leitner, Jan, Lemelle, Laurence, Leroux, Hugues, Luening, Katharina, MacPherson, Glenn J., Marhas, Kuljeet K., Marcus, Matthew A., Matrajt, Graciela, Nakamura, Tomoki, Nakamura-Messenger, Keiko, Nakano, Tsukasa, Newville, Matthew, Papanastassiou, Dimitri A., Pianetta, Piero, Rao, William, Riekel, Christian, Rietmeijer, Frans J. M., Rost, Detlef, Schwandt, Craig S., See, Thomas H., Sheffield-Parker, Julie, Simionovici, Alexandre, Sitnitsky, Ilona, Snead, Christopher J., Stadermann, Frank J., Stephan, Thomas, Stroud, Rhonda M., Susini, Jean, Suzuki, Yoshio, Sutton, Stephen R., Taylor, Susan, Teslich, Nick, Troadec, D., Tsou, Peter, Tsuchiyama, Akira, Uesugi, Kentaro, Vekemans, Bart, Vicenzi, Edward P., Vincze, Laszlo, Westphal, Andrew J., Wozniakiewicz, Penelope, Zinner, Ernst, and Zolensky, Michael E.

Published
2006
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256. Preliminary analysis of the Hayabusa2 samples returned from C-type asteroid Ryugu

Author

Yada, Toru, primary, Abe, Masanao, additional, Okada, Tatsuaki, additional, Nakato, Aiko, additional, Yogata, Kasumi, additional, Miyazaki, Akiko, additional, Hatakeda, Kentaro, additional, Kumagai, Kazuya, additional, Nishimura, Masahiro, additional, Hitomi, Yuya, additional, Soejima, Hiromichi, additional, Yoshitake, Miwa, additional, Iwamae, Ayako, additional, Furuya, Shizuho, additional, Uesugi, Masayuki, additional, Karouji, Yuzuru, additional, Usui, Tomohiro, additional, Hayashi, Tasuku, additional, Yamamoto, Daiki, additional, Fukai, Ryota, additional, Sugita, Seiji, additional, Cho, Yuichiro, additional, Yumoto, Koki, additional, Yabe, Yuna, additional, Bibring, Jean-Pierre, additional, Pilorget, Cedric, additional, Hamm, Vincent, additional, Brunetto, Rosario, additional, Riu, Lucie, additional, Lourit, Lionel, additional, Loizeau, Damien, additional, Lequertier, Guillaume, additional, Moussi-Soffys, Aurelie, additional, Tachibana, Shogo, additional, Sawada, Hirotaka, additional, Okazaki, Ryuji, additional, Takano, Yoshinori, additional, Sakamoto, Kanako, additional, Miura, Yayoi N., additional, Yano, Hajime, additional, Ireland, Trevor R., additional, Yamada, Tetsuya, additional, Fujimoto, Masaki, additional, Kitazato, Kohei, additional, Namiki, Noriyuki, additional, Arakawa, Masahiko, additional, Hirata, Naru, additional, Yurimoto, Hisayoshi, additional, Nakamura, Tomoki, additional, Noguchi, Takaaki, additional, Yabuta, Hikaru, additional, Naraoka, Hiroshi, additional, Ito, Motoo, additional, Nakamura, Eizo, additional, Uesugi, Kentaro, additional, Kobayashi, Katsura, additional, Michikami, Tatsuhiro, additional, Kikuchi, Hiroshi, additional, Hirata, Naoyuki, additional, Ishihara, Yoshiaki, additional, Matsumoto, Koji, additional, Noda, Hirotomo, additional, Noguchi, Rina, additional, Shimaki, Yuri, additional, Shirai, Kei, additional, Ogawa, Kazunori, additional, Wada, Koji, additional, Senshu, Hiroki, additional, Yamamoto, Yukio, additional, Morota, Tomokatsu, additional, Honda, Rie, additional, Honda, Chikatoshi, additional, Yokota, Yasuhiro, additional, Matsuoka, Moe, additional, Sakatani, Naoya, additional, Tatsumi, Eri, additional, Miura, Akira, additional, Yamada, Manabu, additional, Fujii, Atsushi, additional, Hirose, Chikako, additional, Hosoda, Satoshi, additional, Ikeda, Hitoshi, additional, Iwata, Takahiro, additional, Kikuchi, Shota, additional, Mimasu, Yuya, additional, Mori, Osamu, additional, Ogawa, Naoko, additional, Ono, Go, additional, Shimada, Takanobu, additional, Soldini, Stefania, additional, Takahashi, Tadateru, additional, Takei, Yuto, additional, Takeuchi, Hiroshi, additional, Tsukizaki, Ryudo, additional, Yoshikawa, Kent, additional, Terui, Fuyuto, additional, Nakazawa, Satoru, additional, Tanaka, Satoshi, additional, Saiki, Takanao, additional, Yoshikawa, Makoto, additional, Watanabe, Sei-ichiro, additional, and Tsuda, Yuichi, additional

Published
2021
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257. Clinical outcome in patients who underwent amputation due to extremity soft tissue sarcoma: Tokai Musculoskeletal Oncology Consortium study

Author

Hagi, Tomohito, primary, Nakamura, Tomoki, additional, Nagano, Akihito, additional, Koike, Hiroshi, additional, Yamada, Kenji, additional, Aiba, Hisaki, additional, Fujihara, Nasa, additional, Wasa, Junji, additional, Asanuma, Kunihiro, additional, Kozawa, Eiji, additional, Ishimura, Daisuke, additional, Kawanami, Katsuhisa, additional, Izubuchi, Yuya, additional, Shido, Yoji, additional, Sudo, Akihiro, additional, and Nishida, Yoshihiro, additional

Published
2021
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259. The Role of Trabectedin in Soft Tissue Sarcoma

Author

Nakamura, Tomoki and Sudo, Akihiro

Subjects
Pharmacology, Pharmacology (medical)
Abstract

Background: Systemic chemotherapy for advanced disease is another therapeutic option in the management of metastases in soft tissue sarcoma (STS). Doxorubicin either alone or in combination with ifosfamide has been used as first-line chemotherapy. Furthermore, in the past decade, new drugs have been shown to be effective in the treatment of advanced STS after the failure of first-line anthracycline-based chemotherapy: trabectedin, pazopanib and eribulin. However, the appropriate usage of these agents has not been established.Methods: We summarized clinical trials of trabectedin focusing on the efficacy and toxicity of trabectedin in the treatment of STS.Results: Trabectedin can be administered safely and effectively to the patients with advanced STS at second line setting or later. Although trabectedin may be effective as first-line treatment in selected patients, anthracycline-based chemotherapy should be recommended because no regimen in addition to trabectedin has proved to be unequivocally superior to doxorubicin as the first-line treatment for locally advanced or metastatic STS. Nucleotide excision repair (NER) and homologous recombination (HRe) repair may be of particular importance as efficacy of trabectedin.Conclusion: Trabectedin has shown a favorable toxicity profile and is an alternative therapeutic option in patients with advanced STS.

Published
2021

260. Observation opportunities for Mars atmosphere with the MIRS instrument aboard the Martian Moon eXploration mission

Author

Doressoundiram, Alain, Gautier, Thomas, Barucci, Maria, Aoki, Shohei, Lasue, Jérémie, Réess, Jean-Michel, Bernardi, Pernelle, Le Du, Michel, Sawyer, Eric, Iwata, Takahiro, Nakagawa, Hiromu, Nakamura, Tomoki, Laboratoire d'études spatiales et d'instrumentation en astrophysique = Laboratory of Space Studies and Instrumentation in Astrophysics (LESIA), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), PLANETO - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency [Sagamihara] (JAXA), Institut de recherche en astrophysique et planétologie (IRAP), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Centre National d'Études Spatiales [Toulouse] (CNES), and Tohoku University [Sendai]

Subjects
[SDU]Sciences of the Universe [physics], ComputingMilieux_MISCELLANEOUS
Abstract

The Martian Moon eXploration mission (MMX), currently developed by the Japan Aerospace Exploration (JAXA) will aim at studying Mars satellites and return samples from Phobos to decipher the history of the Martian system. MMX mission is to be launched in September 2024 and arrive in Mars system on August 2025, will stay three years in Quasi Satellite Orbits (QSO) around Phobos, and will land for several hours on Phobos to collect at least 10g of Phobos regolith before returning to Earth. Among the mission instrument suite is the near-Infrared Spectrometer MIRS (MMX InfraRed Spectrometer) provided by CNES and built at LESIA-Paris Observatory in collaboration with four other French laboratories (LAB, LATMOS, LAM, IRAP-OMP) and in close collaboration with JAXA and MELCO. MIRS is an imaging spectrometer from 0.9 to 3.6 µm, with a spectral resolution better than 20 nm. The IFOV is 0.35 mrad and FOV of +/-1.65°. The SNR is higher than 100 up to 3.2 µm in a maximum integration time less than 2s. For Mars observation MIRS is expected to perform observations at 10 km spatial resolution, with a spectral radiometric absolute and relative accuracies of 10% and 1% respectively. Given MIRS spectral range, expected Signal-to-Noise ratio, and observation windows, a certain numbers of high priority targets have been set to achieve MMX goal of Constrain transport processes for dust and water near the Martian Surface, continuous observations of the mid-to low-latitude distributions of dust storms, ice clouds and water vapor in the Martian atmosphere (Barucci et al. 2021, Ogohara et al. 2021), summarized in Table 1. Simulated spectra of Martian atmosphere as observed by MIRS are provided in Figure 1. Table 1: List of MIRS main science targets for Mars observations (adapted from Barucci et al. 2021). Target Parameters Spectral range Ice cloud formation and evolution Water ice 1.5, 2 and 3 µm Dust clouds / storms formation and evolution Dust CO2 band @2.7 µm 0.9-3.6 µm continuum Water cycle H2O vapor 2.6 µm Atmospheric dynamics and composition Surface pressure CO2 band @ 2.0 µm CO 2.3 µm Limb observations for middle atmosphere O2 day-glow 1.27 µm Figure 1: Simulated MIRS spectra for typical Mars observation (from Barucci et al. 2021). Plain curves correspond to clear sky conditions, and the dashed ones include the effects of dust or water ice clouds. For gases, CO2, CO, and water vapor are calculated separately and reported in red, orange, and blue curves, respectively. MMX QSO around Phobos will result in a quasi-circular orbit around Mars with a period of ~7h, providing more than 3 hours window to Mars observation when Phobos observation is not possible. Several observation strategies, still in discussion, will be possible to maximize either temporal or spatial coverage of Mars and its atmosphere by MIRS. These strategies span from observations with a 30 minutes temporal resolution of a limited zone, to a complete coverage for low and mid latitude in a few orbits (Ogohara et al. 2021, Barucci et al. 2021). Limb observations may also be performed to obtain high vertical resolution observations of the Martian atmosphere. MIRS observations will provide further constraints on dust and water transport processes in the Martian atmosphere, by monitoring the distributions of dust content and storms, water ice clouds and water vapor. CO2 (and thus pressure) will be monitored through the CO2 2.0 µm band. Water vapor will be monitored on a daily basis using its 2.6 µm band (Maltagliati et al. 2008) and water ice clouds through their spectral features between 0.9 and 3.6 µm (Olsen et al. 2019). MIRS should also be able to detect CO 2.35 µm and O2 at 1.27 µm. MIRS spectra will also allow for estimations of the water adsorbed in the surface regolith. Finally, MIRS will be operated in close collaboration with the OROCHI (Optical Radiometer composed of Chromatic Imagers) and TENGOO (Telescopic Narrow Angle Camera) instruments. This will enable efficient monitoring and reactivity to investigate short lifespan events in Martian atmosphere. This will also render possible the investigation of CO2 clouds following the procedure proposed by Vincendon et al. 2011 for Mars Express observations. The reflectance spectrum from the light backscattered by atmospheric aerosols can be obtained by comparing successive observations of identical zones on Mars within a short time and with varying phase angles. Such a set of measurements permits to decorrelate the surface reflectance signal from the light scattered by the aerosols suspended in the atmosphere and gives information on the aerosols size and their composition properties averaged over the line of sight. Previous measurements showed a particle size distribution having an effective radius of 1.2±0.2 μm (Erard et al. 1994). The retrieved parameters include the scattering albedo, the phase function of the aerosols, the optical thickness, τ, of the atmosphere at the time of observation and the aerosols size distribution. In summary, MIRS observations, together with the ones from MSA, OROCHI and TENGOO, will help better understand the interdependencies of species and their roles in the Martian water, CO2 and dust cycles, thanks to long term monitoring of these key constituents of Mars atmosphere. References Barucci et al. 2021, MIRS an Imaging Spectrometer for the MMX mission, accepted for publication in Earth Planets and Space Erard, S., Mustard, J., Murchie, S., Bibring, J. P., Cerroni, P., & Coradini, A. (1994). Martian aerosols: Near-infrared spectral properties and effects on the observation of the surface. Icarus, 111(2), 317-337. Ogohara et al. 2021, The Mars system revealed by the Martian Moons eXploration mission, accepted for publication in Earth Planets and Space Vincendon et al. 2011, New near-IR observations of mesospheric CO2 and H2O clouds on Mars, JGR Planets 116, 0-02.

Published
2021

264. PAHs, hydrocarbons, and dimethylsulfides in Asteroid Ryugu samples A0106 and C0107 and the Orgueil (CI1) meteorite.

Author

Aponte, José C., Dworkin, Jason P., Glavin, Daniel P., Elsila, Jamie E., Parker, Eric T., McLain, Hannah L., Naraoka, Hiroshi, Okazaki, Ryuji, Takano, Yoshinori, Tachibana, Shogo, Dong, Guannan, Zeichner, Sarah S., Eiler, John M., Yurimoto, Hisayoshi, Nakamura, Tomoki, Yabuta, Hikaru, Terui, Fuyuto, Noguchi, Takaaki, Sakamoto, Kanako, and Yada, Toru

Subjects
ASTEROIDS, METEORITES, ISOTOPIC analysis, SOLAR system, PRESERVATION of materials, ORIGIN of life, TIME-of-flight mass spectrometry, CHEMICAL weathering
Abstract

Evaluating the molecular distribution of organic compounds in pristine extraterrestrial materials is cornerstone to understanding the abiotic synthesis of organics and allows us to better understand the molecular diversity available during the formation of our solar system and before the origins of life on Earth. In this work, we identify multiple organic compounds in solvent extracts of asteroid Ryugu samples A0106 and C0107 and the Orgueil meteorite using two-dimensional gas chromatography and time-of-flight high resolution mass spectrometry (GC×GC–HRMS). Our analyses found similarities between the molecular distribution of organic compounds in Ryugu and the CI carbonaceous chondrite Orgueil. Specifically, several PAHs and organosulfides were found in Ryugu and Orgueil suggesting an interstellar and parent body origin for these compounds. We also evaluated the common relationship between Ryugu, Orgueil, and comets, such as Wild-2; however, until comprehensive compound-specific isotopic analyses for these organic species are undertaken, and until the effects of parent body processes and Earth's weathering processes on meteoritic organics are better understood, their parent–daughter relationships will remain unanswered. Finally, the study of organic compounds in Ryugu samples and the curation practices for the future preservation of these unvaluable materials are also of special interest for future sample return missions, including NASA's OSIRIS-REx asteroid sample return mission. [ABSTRACT FROM AUTHOR]

Published
2023
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265. Dedifferentiated liposarcoma in the extremity and trunk wall: A multi-institutional study of 132 cases by the Japanese Musculoskeletal Oncology Group (JMOG).

Author

Morii, Takeshi, Anazawa, Ukei, Sato, Chiaki, Iwata, Shintaro, Nakagawa, Makoto, Endo, Makoto, Nakamura, Tomoki, Ikuta, Kunihiro, Nishida, Yoshihiro, Nakayama, Robert, Udaka, Toru, Kawamoto, Teruya, Kito, Munehisa, Sato, Kenji, Imanishi, Jungo, Akiyama, Toru, Kobayashi, Hiroshi, Nagano, Akihito, Outani, Hidetatsu, and Toki, Shunichi

Subjects
LIPOSARCOMA, MORTALITY risk factors, SURGICAL margin, SURVIVAL rate, ONCOLOGY
Abstract

Dedifferentiated liposarcoma occurs predominantly in the retroperitoneum. Given the paucity of cases, information on the clinical characteristics of this entity in the extremities and trunk wall is quite limited. In particular, the significance of preoperative evaluation and principles of intraoperative management of the different components, i.e., well-differentiated and dedifferentiated areas, are still to be defined. Clinical characteristics, treatment outcomes, and risk factors for poor oncological outcomes in cases of dedifferentiated liposarcoma in the extremity or trunk wall were analyzed by a retrospective, multicentric study. A total of 132 patients were included. The mean duration from the initial presentation to dedifferentiation was 101 months in dedifferentiation-type cases. The 5-year local recurrence-free survival, metastasis-free survival, and disease-specific survival rates were 71.6%, 75.7%, and 84.7%, respectively. Among 32 patients with metastasis, 15 presented with extrapulmonary metastasis. A percentage of dedifferentiated area over 87.5%, marginal/intralesional margin, and R1/2 resection in the dedifferentiated area were independent risk factors for local recurrence. Dedifferentiated areas over 36 cm2, French Federation of Cancer Centers Sarcoma Group grade III, and intralesional or marginal resection were independent risk factors for metastasis. A dedifferentiated area over 77 cm2 and lung metastasis were independent risk factors for disease-specific mortality. The typical clinical characteristics of dedifferentiated liposarcoma in the extremity and trunk wall were reconfirmed in the largest cohort ever. The evaluation of the dedifferentiated area in terms of grade, extension, and pathological margin, together with securing adequate surgical margins, was critical in the management of this entity. ● The mean time to dedifferentiation was 101 months in dedifferentiation type. ● The 5-year local recurrence and metastasis-free survival were 71.6% and 75.7%. ● The 5-year disease-specific survival rate was 84.7%. ● Among 32 patients with metastasis, 15 presented with extrapulmonary metastasis. ● Grade, extension, and margin in the dedifferentiated area are critical to outcomes. [ABSTRACT FROM AUTHOR]

Published
2023
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266. Small grains from Ryugu: handling and analysis pipeline for infrared synchrotron microspectroscopy.

Author

Rubino, Stefano, Dionnet, Zélia, Aléon-Toppani, Alice, Brunetto, Rosario, Nakamura, Tomoki, Baklouti, Donia, Djouadi, Zahia, Lantz, Cateline, Mivumbi, Obadias, Borondics, Ferenc, Lefrançois, Stephane, Sandt, Christophe, Capitani, Francesco, Héripré, Eva, Troadec, David, Matsumoto, Megumi, Amano, Kana, Morita, Tomoyo, Yurimoto, Hisayoshi, and Noguchi, Takaaki

Subjects
SCIENTIFIC community, ASTEROIDS
Abstract

Sample-return missions allow the study of materials collected directly from celestial bodies, unbiased by atmospheric entry effects and/or terrestrial alteration and contamination phenomena, using state-of-the-art techniques which are available only in a laboratory environment—but only if the collected material stays pristine. The scarcity of outer-space unaltered material recovered until now makes this material extremely precious for the potential scientific insight it can bring. To maximize the scientific output of current and future sample-return missions, the scientific community needs to plan for ways of storing, handling, and measuring this precious material while preserving their pristine state for as long as the 'invasiveness' of measurements allows. In July 2021, as part of the Hayabusa2 (JAXA) "Stone" preliminary examination team, we received several microscopic particles from the asteroid Ryugu, with the goal of performing IR hyper-spectral imaging and IR micro-tomography studies. Here, we describe the sample transfer, handling methods and analytical pipeline we implemented to study this very precious material while minimizing and surveilling their alteration history on Earth. [ABSTRACT FROM AUTHOR]

Published
2023
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269. Anaerobic Microscopic Analysis of Ferrous Saponite and Its Sensitivity to Oxidation by Earth’s Air: Lessons Learned for Analysis of Returned Samples from Mars and Carbonaceous Asteroids

Author

Noda, Natsumi, primary, Yamashita, Shohei, additional, Takahashi, Yoshio, additional, Matsumoto, Megumi, additional, Enokido, Yuma, additional, Amano, Kana, additional, Kawai, Takahiro, additional, Sakuma, Hiroshi, additional, Fukushi, Keisuke, additional, Sekine, Yasuhito, additional, and Nakamura, Tomoki, additional

Published
2021
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270. Clinical Outcome in Soft Tissue Sarcoma Patients with Lung Metastasis Who Received Metastasectomy and/or Radiofrequency Ablation: Tokai Musculoskeletal Oncology Consortium Study

Author

Nakamura, Tomoki, primary, Asanuma, Kunihiro, additional, Takao, Motoshi, additional, Yamanaka, Takashi, additional, Koike, Hiroshi, additional, Chen-Yoshikawa, Toyofumi F, additional, Tsukushi, Satoshi, additional, Kuroda, Hiroaki, additional, Kozawa, Eiji, additional, Sano, Masaaki, additional, Aiba, Hisaki, additional, Nakanishi, Ryoichi, additional, Nagano, Akihito, additional, Yamada, Kenji, additional, Shido, Yoji, additional, Kawanami, Katsuhisa, additional, Izubuchi, Yuya, additional, Sudo, Akihiro, additional, and Nishida, Yoshihiro, additional

Published
2021
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272. High-resolution observations of bright boulders on asteroid Ryugu: 2. Spectral properties

Author

Sugimoto, Chiho, primary, Tatsumi, Eri, additional, Cho, Yuichiro, additional, Morota, Tomokatsu, additional, Honda, Rie, additional, Kameda, Shingo, additional, Yokota, Yosuhiro, additional, Yumoto, Koki, additional, Aoki, Minami, additional, DellaGiustina, Daniella N., additional, Michikami, Tatsuhiro, additional, Hiroi, Takahiro, additional, Domingue, Deborah L., additional, Michel, Patrick, additional, Schröder, Stefan E., additional, Nakamura, Tomoki, additional, Yamada, Manabu, additional, Sakatani, Naoya, additional, Kouyama, Toru, additional, Honda, Chikatoshi, additional, Hayakawa, Masahiko, additional, Matsuoka, Moe, additional, Suzuki, Hidehiko, additional, Yoshioka, Kazuo, additional, Ogawa, Kazunori, additional, Sawada, Hirotaka, additional, Arakawa, Masahiko, additional, Saiki, Takanao, additional, Imamura, Hiroshi, additional, Takagi, Yasuhiko, additional, Yano, Hajime, additional, Shirai, Kei, additional, Okamoto, Chisato, additional, Tsuda, Yuichi, additional, Nakazawa, Satoru, additional, Iijima, Yuichi, additional, and Sugita, Seiji, additional

Published
2021
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273. High-resolution observations of bright boulders on asteroid Ryugu: 1. Size frequency distribution and morphology

Author

Sugimoto, Chiho, primary, Tatsumi, Eri, additional, Cho, Yuichiro, additional, Morota, Tomokatsu, additional, Honda, Rie, additional, Kameda, Shingo, additional, Yokota, Yosuhiro, additional, Yumoto, Koki, additional, Aoki, Minami, additional, DellaGiustina, Daniella N., additional, Michikami, Tatsuhiro, additional, Hiroi, Takahiro, additional, Domingue, Deborah L., additional, Michel, Patrick, additional, Schröder, Stefan E., additional, Nakamura, Tomoki, additional, Yamada, Manabu, additional, Sakatani, Naoya, additional, Kouyama, Toru, additional, Honda, Chikatoshi, additional, Hayakawa, Masahiko, additional, Matsuoka, Moe, additional, Suzuki, Hidehiko, additional, Yoshioka, Kazuo, additional, Ogawa, Kazunori, additional, Sawada, Hirotaka, additional, Arakawa, Masahiko, additional, Saiki, Takanao, additional, Imamura, Hiroshi, additional, Takagi, Yasuhiko, additional, Yano, Hajime, additional, Shirai, Kei, additional, Okamoto, Chisato, additional, Tsuda, Yuichi, additional, Nakazawa, Satoru, additional, Iijima, Yuichi, additional, and Sugita, Seiji, additional

Published
2021
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276. Spectrally blue hydrated parent body of asteroid (162173) Ryugu

Author

Tatsumi, Eri, primary, Sakatani, Naoya, additional, Riu, Lucie, additional, Matsuoka, Moe, additional, Honda, Rie, additional, Morota, Tomokatsu, additional, Kameda, Shingo, additional, Nakamura, Tomoki, additional, Zolensky, Michael, additional, Brunetto, Rosario, additional, Hiroi, Takahiro, additional, Sasaki, Sho, additional, Watanabe, Sei’ichiro, additional, Tanaka, Satoshi, additional, Takita, Jun, additional, Pilorget, Cédric, additional, de León, Julia, additional, Popescu, Marcel, additional, Rizos, Juan Luis, additional, Licandro, Javier, additional, Palomba, Ernesto, additional, Domingue, Deborah, additional, Vilas, Faith, additional, Campins, Humberto, additional, Cho, Yuichiro, additional, Yoshioka, Kazuo, additional, Sawada, Hirotaka, additional, Yokota, Yasuhiro, additional, Hayakawa, Masahiko, additional, Yamada, Manabu, additional, Kouyama, Toru, additional, Suzuki, Hidehiko, additional, Honda, Chikatoshi, additional, Ogawa, Kazunori, additional, Kitazato, Kohei, additional, Hirata, Naru, additional, Hirata, Naoyuki, additional, Tsuda, Yuichi, additional, Yoshikawa, Makoto, additional, Saiki, Takanao, additional, Terui, Fuyuto, additional, Nakazawa, Satoru, additional, Takei, Yuto, additional, Takeuchi, Hiroshi, additional, Yamamoto, Yukio, additional, Okada, Tatsuaki, additional, Shimaki, Yuri, additional, Shirai, Kei, additional, and Sugita, Seiji, additional

Published
2021
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281. Successful treatment with cryoablation in a patient with bone metastasis in the mid-shaft femur: a case report

Author

Kita, Kouji, Nakamura, Tomoki, Yamanaka, Takashi, Yoshida, Keisuke, Hagi, Tomohito, Asanuma, Kunihiro, Nakatsuka, Atsuhiro, and Sudo, Akihiro

Subjects
cryoablation, Case Report, leiomyosarcoma, bone metastasis
Abstract

Background: Treatment of metastatic bone tumors is challenging due to the morbidity associated with patients with metastasis. The present case report described a patient with successful treatment of bone metastasis using cryoablation with plate and cementation to prevent fracture for bone metastasis of leiomyosarcoma in the mid-shaft of the femur. Case report: The metastatic tumor was located at intramedullary lesion of the femur. At first, cryoablation was performed under local anesthesia. After one week after cryoablation, curettage and fixation with plate and cementation were performed to prevent fracture. Tumor cells were not observed in the histopathological findings of the curettage tissue. Four years after cryoablation, there was no recurrence and the patient could walk without any support. Conclusion: We suggest that a tumor with limited cancellous bone and of a small size may undergo cryoablation. The prevention of fracture after cryoablation should be considered.

Published
2019

283. Trace-element analysis of mineral grains in Ryugu rock fragment sections by synchrotron-based confocal X-ray fluorescence.

Author

Bazi, Benjamin, Tack, Pieter, Lindner, Miles, Vekemans, Bart, De Pauw, Ella, Tkalcec, Beverley, Brenker, Frank E., Garrevoet, Jan, Falkenberg, Gerald, Yabuta, Hikaru, Yurimoto, Hisayoshi, Nakamura, Tomoki, Amano, Kana, Matsumoto, Megumi, Fujioka, Yuri, Enokido, Yuma, Nakashima, Daisuke, Uesugi, Masayuki, Naraoka, Hiroshi, and Noguchi, Takaaki

Subjects
X-ray fluorescence, MINERAL analysis, SYNCHROTRON radiation, MAGNETITE, PYRRHOTITE, SYNCHROTRONS, DOLOMITE, GRAIN
Abstract

A fundamental parameter-based quantification scheme for confocal XRF was applied to sub-micron synchrotron radiation X-ray fluorescence (SR-XRF) data obtained at the beamline P06 of the Deutsches Elektronen-Synchrotron (DESY, Hamburg, Germany) from two sections C0033-01 and C0033-04 that were wet cut from rock fragment C0033 collected from Cb-type asteroid (162173) Ryugu by JAXA's Hayabusa2 mission. Trace-element quantifications show that C0033 bulk matrix is CI-like, whereas individual mineral grains (i.e., magnetite, pyrrhotite, dolomite, apatite and breunnerite) show, depending on the respective phase, minor to strong deviations. The non-destructive nature of SR-XRF coupled with a new PyMca (a Python toolkit for XRF data analysis)-based quantification approach, performed in parallel with the synchrotron experiments, proves to be an attractive tool for the initial analysis of samples from return missions, such as Hayabusa2 and OSIRIS-REx, the latter returning material from a B-type asteroid (101955) Bennu in 2023. [ABSTRACT FROM AUTHOR]

Published
2022
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284. Rare earth element identification and quantification in millimetre-sized Ryugu rock fragments from the Hayabusa2 space mission.

Author

Tack, Pieter, De Pauw, Ella, Tkalcec, Beverley, Lindner, Miles, Bazi, Benjamin, Vekemans, Bart, Brenker, Frank, Di Michiel, Marco, Uesugi, Masayuki, Yurimoto, Hisayoshi, Nakamura, Tomoki, Amano, Kana, Matsumoto, Megumi, Fujioka, Yuri, Enokido, Yuma, Nakashima, Daisuke, Noguchi, Takaaki, Okazaki, Ryuji, Yabuta, Hikaru, and Naraoka, Hiroshi

Subjects
RARE earth metals, X-ray fluorescence, FLUORESCENCE spectroscopy, X-ray spectroscopy, ASTEROIDS, ATMOSPHERE
Abstract

Millimetre-sized primordial rock fragments originating from asteroid Ryugu were investigated using high energy X-ray fluorescence spectroscopy, providing 2D and 3D elemental distribution and quantitative composition information on the microscopic level. Samples were collected in two phases from two sites on asteroid Ryugu and safely returned to Earth by JAXA's asteroid explorer Hayabusa2, during which time the collected material was stored and maintained free from terrestrial influences, including exposure to Earth's atmosphere. Several grains of interest were identified and further characterised to obtain quantitative information on the rare earth element (REE) content within said grains, following a reference-based and computed-tomography-assisted fundamental parameters quantification approach. Several orders of magnitude REE enrichments compared to the mean CI chondrite composition were found within grains that could be identified as apatite phase. Small enrichment of LREE was found for dolomite grains and slight enrichment or depletion for the general matrices within the Ryugu rock fragments A0055 and C0076, respectively. [ABSTRACT FROM AUTHOR]

Published
2022
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285. The role of soluble CD80 in patients with soft tissue tumors.

Author

Matsuyama, Yumi, Asanuma, Kunihiro, Yoshida, Keisuke, Hagi, Tomohito, Iino, Takahiro, Nakamura, Tomoki, and Sudo, Akihiro

Subjects
SOFT tissue tumors, ANTIGENS
Abstract

Background: Immune checkpoint protein (ICP), which is a central factor group of the immune system, has been reported to have a correlation between the degree of its expression and the prognosis of patients with malignant tumors, and many inhibitors have appeared as therapeutic targets. On the other hand, a soluble form of ICP in circulating blood induced systemic immunosuppression. In this study, we investigated the relationship between the soluble form of CD80 (sCD80) which is a ligand for the inhibitory system CTLA-4, in blood, and clinicopathological parameters in patients with soft tissue tumors. Methods: A total of 119 patients with primary soft tissue tumors were enrolled in this study. The sCD80 levels were measured by enzyme immunoassay. Results: There were no significant differences in sCD80 levels between benign (34) and soft tissue sarcoma (STS) patients (85). In STS, the high-sCD80 group had significantly lower metastasis-free survival (MS) and lower overall survival (OS) than the low-sCD80 group at 5 years using the log-rank test (OS: high > 404 pg/mL, low ≤ 404 pg/mL, MS: high > 531 pg/ml, low ≤ 531 pg/ml). On multivariate Cox proportional hazard analysis, the high-sCD80 group had significant differences in 5MS and 5OS compared to the low-sCD80 group. Conclusions: In conclusion, sCD80 may negatively affect systemic immune circumstances, in STS, and may have potential as a therapeutic target. [ABSTRACT FROM AUTHOR]

Published
2022
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289. MIRS: an imaging spectrometer for MMX mission

Author

Bour, Aurélien, primary, Réess, Jean-Michel, additional, Bernardi, Pernelle, additional, Barucci, Maria Antonietta, additional, Castelnau, Matthieu, additional, Le Du, Michel, additional, Iwata, Takahiro, additional, Nakagawa, Hiromu, additional, Nakamura, Tomoki, additional, Doressoundiram, Alain, additional, and Fornasier, Sonia, additional

Published
2021
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290. Effect of Neoadjuvant Therapies on Soft Tissue Sarcomas with Tail-like Lesions: A Multicenter Retrospective Study

Author

Aiba, Hisaki, primary, Ikuta, Kunihiro, additional, Asanuma, Kunihiro, additional, Kawanami, Katsuhisa, additional, Tsukushi, Satoshi, additional, Matsumine, Akihiko, additional, Ishimura, Daisuke, additional, Nagano, Akihito, additional, Shido, Yoji, additional, Kozawa, Eiji, additional, Yamada, Kenji, additional, Wasa, Junji, additional, Kimura, Hiroaki, additional, Sakai, Takao, additional, Murakami, Hideki, additional, Sakai, Tomohisa, additional, Nakamura, Tomoki, additional, and Nishida, Yoshihiro, additional

Published
2021
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291. MIRS Imaging Spectrometer for the Martian Moon Explorer (MMX) Mission

Author

Fornasier, Sonia, primary, Barucci, Maria Antonietta, additional, Reess, Jean-Michel, additional, Bernardi, Pernelle, additional, Le Du, Michel, additional, Doressoundiram, Alain, additional, Iwata, Takahiro, additional, Nakagawa, Hiromu, additional, Nakamura, Tomoki, additional, Chapron, Frederic, additional, Nguyen Tuong, Napoleon, additional, Parisot, Jerome, additional, Castelnau, Matthieu, additional, Bour, Aurelien, additional, and Tache, Feriel, additional

Published
2021
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293. Ryugu: A brand-new planetary sample returned from a C-type asteroid

Author

Yada, Toru, primary, Abe, Masanao, additional, Okada, Tatsuaki, additional, Nakato, Aiko, additional, Yogata, Kasumi, additional, Miyazaki, Akiko, additional, Hatakeda, Kentaro, additional, Kumagai, Kazuya, additional, Nishimura, Masahiro, additional, Hitomi, Yuya, additional, Soejima, Hiromichi, additional, Yoshitake, Miwa, additional, Iwamae, Ayako, additional, Furuya, Shizuho, additional, Uesugi, Masayuki, additional, Karouji, Yuzuru, additional, Usui, Tomohiro, additional, Hayashi, Tasuku, additional, Yamamoto, Daiki, additional, Fukai, Ryota, additional, Sugita, Seiji, additional, Cho, Yuichiro, additional, Yumoto, Koki, additional, Yabe, Yuna, additional, Bibring, Jean-Pierre, additional, Pilorget, Cedric, additional, Hamm, Vincent, additional, Brunetto, Rosario, additional, Riu, Lucie, additional, Lourit, Lionel, additional, Loizeau, Damien, additional, Lequertier, Guillaume, additional, Moussi-Soffys, Aurelie, additional, Tachibana, Shogo, additional, Sawada, Hirotaka, additional, Okazaki, Ryuji, additional, Takano, Yoshinori, additional, Sakamoto, Kanako, additional, Miura, Yayoi, additional, Yano, Hajime, additional, Ireland, Trevor, additional, Yamada, Tetsuya, additional, Fujimoto, Masaki, additional, Kitazato, Kohei, additional, Namiki, Noriyuki, additional, Arakawa, Masahiko, additional, Hirata, Naru, additional, Yurimoto, Hisayoshi, additional, Nakamura, Tomoki, additional, Noguchi, Takaaki, additional, Yabuta, Hikaru, additional, Naraoka, Hiroshi, additional, Ito, Motoo, additional, Nakamura, Eizo, additional, Uesugi, Kentaro, additional, Kobayashi, Katsura, additional, Michikami, Tatsuhiro, additional, Kikuchi, Hiroshi, additional, Hirata, Naoyuki, additional, Ishihara, Yoshiaki, additional, Matsumoto, Koji, additional, Noda, Hirotomo, additional, Noguchi, Rina, additional, Shimaki, Yuri, additional, Ogawa, Kazunori, additional, Shirai, Kei, additional, Wada, Koji, additional, Senshu, Hiroki, additional, Yamamoto, Yukio, additional, Morota, Tomokatsu, additional, Honda, Rie, additional, Honda, Chikatoshi, additional, Yokota, Yasuhiro, additional, Matsuoka, Moe, additional, Sakatani, Naoya, additional, Tatsumi, Eri, additional, Miura, Akira, additional, Yamada, Manabu, additional, Fujii, Atsushi, additional, Hirose, Chikako, additional, Hosoda, Satoshi, additional, Ikeda, Hitoshi, additional, Iwata, Takahiro, additional, Kikuchi, Shota, additional, Mimasu, Yuya, additional, Mori, Osamu, additional, Ogawa, Naoko, additional, Ono, Go, additional, Shimada, Takanobu, additional, Soldini, Stefania, additional, Takahashi, Tadateru, additional, Takei, Yuto, additional, Takeuchi, Hiroshi, additional, Tsukizaki, Ryudo, additional, Yoshikawa, Kent, additional, Terui, Fuyuto, additional, Nakazawa, Satoru, additional, Tanaka, Satoshi, additional, Saiki, Takanao, additional, Yoshikawa, Makoto, additional, Watanabe, Sei-ichiro, additional, and Tsuda, Yuichi, additional

Published
2021
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295. Science Targets and Development Results of MIRS: MMX Infrared Spectrometer on the MMX Spacecraft

Author

ANTONIETTA, BARUCCI Maria, PEESS, Jean-Michel, BERNARDI, Pernelle, DORESSOUNDRIAM, Alain, FRONASIER, Sonia, DU, Michel Le, SAWYER, Eric, IWATA, Takahiro, NAKAGAWA, Hiromu, NAKAMURA, Tomoki, and TSUCHIYA, Fuminori

Abstract

第21回宇宙科学シンポジウム (2021年1月6日-7日. オンライン開催), 21st Space Science Symposium (January 6-7, 2021. Online Meeting), 著者人数: 11名, 資料番号: SA6000163100, レポート番号: g10-17

Published
2021

296. Spectral investigation of bright and dark areas on Ryugu surface

Author

Palomba, Ernesto, Watanabe, Shin, Abe, Masanao, Okada, Tatsuaki, Matsumoto, Koji, Yoshikawa, Makoto, Yamamoto, Yukio, Shirai, Kei, Takei, Yoh, Hirata, Naru, D'Amore, Mario, Ohtake, Makiko, Kitazato, Kohei, Saiki, Takanao, Tanaka, Satoshi, Iwata, Takahiro, Hiroi, Takahiro, Tsuda, Yuichi, Nakamura, Tomoki, Longobardo, Andrea, Galiano, Anna, Matsuura, Shuji, Zinzi, Angelo, Dirri, Fabrizio, Takir, D., and Andrisani, M.

Subjects
Spectral, surface, Ryugu
Published
2021

297. High-Resolution Observations of Bright Boulders on Asteroid Ryugu: 1. Size Frequency Distribution and Morphology

Author

Sugimoto, Chiho, Tatsumi, Eri, Cho, Yuichiro, Morota, Tomokatsu, Honda, Rie, Kameda, Shingo, Yokota, Yosuhiro, Yumoto, Koki, Aoki, Minami, DellaGiustina, Daniella N., Michikami, Tatsuhiro, Hiroi, Takahiro, Domingue, Deborah L., Michel, Patrick, Schröder, Stefan E., Nakamura, Tomoki, Yamada, Manabu, Sakatani, Naoya, Kouyama, Toru, Honda, Chikatoshi, Hayakawa, Masahiko, Matsuoka, Moe, Suzuki, Hidehiko, Yoshioka, Kazuo, Ogawa, Kazunori, Sawada, Hirotaka, Arakawa, Masahiko, Saiki, Takanao, Imamura, Hiroshi, Takagi, Yasuhiko, Yano, Hajime, Shirai, Kei, Okamoto, Chisato, Tsuda, Yuichi, Nakazawa, Satoru, Iijima, Yuichi, Sugita, Seiji, Sugimoto, Chiho, Tatsumi, Eri, Cho, Yuichiro, Morota, Tomokatsu, Honda, Rie, Kameda, Shingo, Yokota, Yosuhiro, Yumoto, Koki, Aoki, Minami, DellaGiustina, Daniella N., Michikami, Tatsuhiro, Hiroi, Takahiro, Domingue, Deborah L., Michel, Patrick, Schröder, Stefan E., Nakamura, Tomoki, Yamada, Manabu, Sakatani, Naoya, Kouyama, Toru, Honda, Chikatoshi, Hayakawa, Masahiko, Matsuoka, Moe, Suzuki, Hidehiko, Yoshioka, Kazuo, Ogawa, Kazunori, Sawada, Hirotaka, Arakawa, Masahiko, Saiki, Takanao, Imamura, Hiroshi, Takagi, Yasuhiko, Yano, Hajime, Shirai, Kei, Okamoto, Chisato, Tsuda, Yuichi, Nakazawa, Satoru, Iijima, Yuichi, and Sugita, Seiji

Abstract

The near-Earth asteroid (162173) Ryugu displays a Cb-type average spectrum and a very low average normal albedo of 0.04. Although the majority of boulders on Ryugu have reflectance spectra and albedo similar to the Ryugu average, a small fraction of boulders exhibit anomalously high albedo and distinctively different spectra. A previous study (Tatsumi et al., 2021) based on the 2.7-km observations and a series of low-altitude (down to 68 m) descent observations conducted prior to the first touchdown have shown that the spectra of these anomalous boulders can be classified into two distinct groups corresponding to S and C type asteroids. The former originate most likely from an impactor that collided with Ryugu's parent body, whereas the latter may be from portions of Ryugu's parent body that experienced a different temperature history than experienced by the majority of boulder materials. In this study, we analyzed images captured after the first touchdown to determine the quantitative properties of these bright boulders on Ryugu. We measured the sizes of more than a thousand bright boulders and characterized the morphologic properties of the largest ones. Analyses revealed many properties of bright boulders important for the evolution of Ryugu and its parent body. The size-frequency distributions of S- and C-type bright boulders follow power laws. We obtained the ratios of the total volume and surface area of S-type bright boulders to those of average dark boulders on the Ryugu surface. Also, many of the bright boulders are embedded in a larger substrate boulder, suggesting that they have experienced mixing and conglomeration with darker fragments on the parent body, rather than gently landing on Ryugu during or after its formation by reaccumulation. This is consistent with the hypothesis that S-type bright boulders were likely mixed during and/or before a catastrophic disruption., Comment: 19 pages, 11 figures, 3 Tables, published in Icarus, 369, 15 November, 2021, 114529

Published
2021
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298. High-Resolution Observations of Bright Boulders on Asteroid Ryugu: 2. Spectral Properties

Author

Sugimoto, Chiho, Tatsumi, Eri, Cho, Yuichiro, Morota, Tomokatsu, Honda, Rie, Kameda, Shingo, Yokota, Yosuhiro, Yumoto, Koki, Aoki, Minami, DellaGiustina, Daniella N., Michikami, Tatsuhiro, Hiroi, Takahiro, Domingue, Deborah L., Michel, Patrick, Schröder, Stefan, Nakamura, Tomoki, Yamada, Manabu, Sakatani, Naoya, Kouyama, Toru, Honda, Chikatoshi, Hayakawa, Masahiko, Matsuoka, Moe, Suzuki, Hidehiko, Yoshioka, Kazuo, Ogawa, Kazunori, Sawada, Hirotaka, Arakawa, Masahiko, Saiki, Takanao, Imamura, Hiroshi, Takagi, Yasuhiko, Yano, Hajime, Shirai, Kei, Okamoto, Chisato, Tsuda, Yuichi, Nakazawa, Satoru, Iijima, Yuichi, Sugita, Seiji, Sugimoto, Chiho, Tatsumi, Eri, Cho, Yuichiro, Morota, Tomokatsu, Honda, Rie, Kameda, Shingo, Yokota, Yosuhiro, Yumoto, Koki, Aoki, Minami, DellaGiustina, Daniella N., Michikami, Tatsuhiro, Hiroi, Takahiro, Domingue, Deborah L., Michel, Patrick, Schröder, Stefan, Nakamura, Tomoki, Yamada, Manabu, Sakatani, Naoya, Kouyama, Toru, Honda, Chikatoshi, Hayakawa, Masahiko, Matsuoka, Moe, Suzuki, Hidehiko, Yoshioka, Kazuo, Ogawa, Kazunori, Sawada, Hirotaka, Arakawa, Masahiko, Saiki, Takanao, Imamura, Hiroshi, Takagi, Yasuhiko, Yano, Hajime, Shirai, Kei, Okamoto, Chisato, Tsuda, Yuichi, Nakazawa, Satoru, Iijima, Yuichi, and Sugita, Seiji

Abstract

Many small boulders with reflectance values higher than 1.5 times the average reflectance have been found on the near-Earth asteroid 162173 Ryugu. Based on their visible wavelength spectral differences, Tatsumi et al. (2021) defined two bright boulder classes: C-type and S-type. These two classifications of bright boulders have different size distributions and spectral trends. In this study, we measured the spectra of 79 bright boulders and investigated their detailed spectral properties. Analyses obtained a number of important results. First, S-type bright boulders on Ryugu have spectra that are similar to those found for two different ordinary chondrites with different initial spectra that have been experimentally space weathered the same way. This suggests that there may be two populations of S-type bright boulders on Ryugu, perhaps originating from two different impactors that hit its parent body. Second, the model space-weathering ages of meter-size S-type bright boulders, based on spectral change rates derived in previous experimentally irradiated ordinary chondrites, are 0.1-1 Myr, which is consistent with the crater retention age (

Published
2021
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299. Science operation plan of Phobos and Deimos from the MMX spacecraft

Author

Nakamura, Tomoki, Ikeda, Hitoshi, Kouyama, Toru, Nakagawa, Hiromu, Kusano, Hiroki, Senshu, Hiroki, Kameda, Shingo, Matsumoto, Koji, Ferran, Gonzalez-Franquesa, Ozaki, Naoya, Takeo, Yosuke, Baresi, Nicola, Oki, Yusuke, J. Lawrence, David, L. Chabot, Nancy, N. Peplowski, Patrick, Antonietta Barucci, Maria, Sawyer, Eric, Yokota, Shoichiro, Terada, Naoki, Ulamec, Stephan, Michel, Patrick, Kobayashi, Masanori, Sasaki, Sho, Hirata, Naru, Wada, Koji, Miyamoto, Hideaki, Imamura, Takeshi, Ogawa, Naoko, Ogawa, Kazunori, Iwata, Takahiro, Imada, Takane, Otake, Hisashi, Canalias, Elisabet, Lorda, Laurence, Tardivel, Simon, Stéphane, Mary, Kunugi, Makoto, Mitsuhashi, Seiji, Doressoundiram, Alain, Frédéric, Merlin, Fornasier, Sonia, Jean-Michel, Reess, Bernardi, Pernelle, Imai, Shigeru, Ito, Yasuyuki, Ishida, Hatsumi, Kuramoto, Kiyoshi, Kawakatsu, Yasuhiro, Hiroki, Kusano, Nakamura, Tomoki, Ikeda, Hitoshi, Kouyama, Toru, Nakagawa, Hiromu, Kusano, Hiroki, Senshu, Hiroki, Kameda, Shingo, Matsumoto, Koji, Ferran, Gonzalez-Franquesa, Ozaki, Naoya, Takeo, Yosuke, Baresi, Nicola, Oki, Yusuke, J. Lawrence, David, L. Chabot, Nancy, N. Peplowski, Patrick, Antonietta Barucci, Maria, Sawyer, Eric, Yokota, Shoichiro, Terada, Naoki, Ulamec, Stephan, Michel, Patrick, Kobayashi, Masanori, Sasaki, Sho, Hirata, Naru, Wada, Koji, Miyamoto, Hideaki, Imamura, Takeshi, Ogawa, Naoko, Ogawa, Kazunori, Iwata, Takahiro, Imada, Takane, Otake, Hisashi, Canalias, Elisabet, Lorda, Laurence, Tardivel, Simon, Stéphane, Mary, Kunugi, Makoto, Mitsuhashi, Seiji, Doressoundiram, Alain, Frédéric, Merlin, Fornasier, Sonia, Jean-Michel, Reess, Bernardi, Pernelle, Imai, Shigeru, Ito, Yasuyuki, Ishida, Hatsumi, Kuramoto, Kiyoshi, Kawakatsu, Yasuhiro, and Hiroki, Kusano

Abstract

The science operations of the spacecraft and remote sensing instruments for the Martian Moon eXploration (MMX) mission are discussed by the mission operation working team. In this paper, we describe the Phobos observations during the first 1.5 years of the spacecraft’s stay around Mars, and the Deimos observations before leaving the Martian system. In the Phobos observation, the spacecraft will be placed in low-altitude quasi-satellite orbits on the equatorial plane of Phobos and will make high-resolution topographic and spectroscopic observations of the Phobos surface from five different altitudes orbits. The spacecraft will also attempt to observe polar regions of Phobos from a three-dimensional quasi-satellite orbit moving out of the equatorial plane of Phobos. From these observations, we will constrain the origin of Phobos and Deimos and select places for landing site candidates for sample collection. For the Deimos observations, the spacecraft will be injected into two resonant orbits and will perform many flybys to observe the surface of Deimos over as large an area as possible.

Published
2021

300. Wafer-level Variation Modeling for Multi-site RF IC Testing via Hierarchical Gaussian Process

Author

Shintani, Michihiro, Mian, Riaz-Ul-Haque, Nakamura, Tomoki, Kajiyama, Masuo, Eiki, Makoto, Inoue, Michiko, Shintani, Michihiro, Mian, Riaz-Ul-Haque, Nakamura, Tomoki, Kajiyama, Masuo, Eiki, Makoto, and Inoue, Michiko

Abstract

Wafer-level performance prediction has been attracting attention to reduce measurement costs without compromising test quality in production tests. Although several efficient methods have been proposed, the site-to-site variation, which is often observed in multi-site testing for radio frequency circuits, has not yet been sufficiently addressed. In this paper, we propose a wafer-level performance prediction method for multi-site testing that can consider the site-to-site variation. The proposed method is based on the Gaussian process, which is widely used for wafer-level spatial correlation modeling, improving the prediction accuracy by extending hierarchical modeling to exploit the test site information provided by test engineers. In addition, we propose an active test-site sampling method to maximize measurement cost reduction. Through experiments using industrial production test data, we demonstrate that the proposed method can reduce the estimation error to 1/19 of that obtained using a conventional method. Moreover, we demonstrate that the proposed sampling method can reduce the number of the measurements by 97% while achieving sufficient estimation accuracy., Comment: 10 pages, 13 figures

Published
2021

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