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1. Thermo-physical properties of 162173 (1999 JU3), a potential flyby and rendezvous target for interplanetary missions

Author

Mueller, T. G., Durech, J., Hasegawa, S., Abe, M., Kawakami, K., Kasuga, T., Kinoshita, D., Kuroda, D., Urakawa, S., Okumura, S., Sarugaku, Y., Miyasaka, S., Takagi, Y., Weissman, P. R., Choi, Y. -J., Larson, S., Yanagisawa, K., and Nagayama, S.

Subjects
Astrophysics - Earth and Planetary Astrophysics
Abstract

Near-Earth asteroid 162173 (1999 JU3) is a potential flyby and rendezvous target for interplanetary missions because of its easy to reach orbit. The physical and thermal properties of the asteroid are relevant for establishing the scientific mission goals and also important in the context of near-Earth object studies in general. Our goal was to derive key physical parameters such as shape, spin-vector, size, geometric albedo, and surface properties of 162173 (1999 JU3). With three sets of published thermal observations (ground-based N-band, Akari IRC, Spitzer IRS), we applied a thermophysical model to derive the radiometric properties of the asteroid. The calculations were performed for the full range of possible shape and spin-vector solutions derived from the available sample of visual lightcurve observations. The near-Earth asteroid 162173 (1999 JU3) has an effective diameter of 0.87 +/- 0.03 km and a geometric albedo of 0.070 +/- 0.006. The chi2-test reveals a strong preference for a retrograde sense of rotation with a spin-axis orientation of lambda_ecl = 73 deg, beta_ecl = -62 deg and P_sid = 7.63 +/- 0.01 h. The most likely thermal inertia ranges between 200 and 600 Jm-2s-0.5K-1, about a factor of 2 lower than the value for 25143 Itokawa. This indicates that the surface lies somewhere between a thick-dust regolith and a rock/boulder/cm-sized, gravel-dominated surface like that of 25143 Itokawa. Our analysis represents the first time that shape and spin-vector information has been derived from a combined data set of visual lightcurves (reflected light) and mid-infrared photometry and spectroscopy (thermal emission)., Comment: 6 pages, 5 figures, 2 tables, accepted for publication in A&A (date of acceptance 05/Nov/2010)

Published
2010
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2. Apollo asteroids (1566) Icarus and 2007 MK6: Icarus family members?

Author

Ohtsuka, K., Arakida, H., Ito, T., Kasuga, T., Watanabe, J., Kinoshita, D., Sekiguchi, T., Asher, D. J., and Nakano, S.

Subjects
Astrophysics
Abstract

Although it is more complicated to search for near-Earth object (NEO) families than main belt asteroid (MBA) families, since differential orbital evolution within a NEO family can cause current orbital elements to drastically differ from each other, we have found that Apollo asteroids (1566) Icarus and the newly discovered 2007 MK6 are almost certainly related. Specifically, their orbital evolutions show a similar profile, time shifted by only ~1000 yr, based on our time-lag theory. The dynamical relationship between Icarus and 2007 MK6 along with a possible dust band, the Taurid-Perseid meteor swarm, implies the first detection of an asteroidal NEO family, namely the "Icarus asteroid family"., Comment: 11 pages, 1 figure, to appear on Astrophysical Journal Letters (journal info added)

Published
2007
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3. A 32 m Parabolic Antenna in Peru At 3,370m of Altitude

Author

Ishitsuka, J., Ishitsuka, M., Kaifu, N., Miyama, S., Inoue, M., Tsuboi, M., Ohishi, M., Fujisawa, K., Kasuga, T., Miyazawa, K., and Horiuchi, S.

Subjects
Astrophysics
Abstract

At the altitude of 3,370 m on the Peruvian Andes, a 32m antenna owned by the telecommunications company Telefonica del Peru will be transformed to a Radio Telescope, it would be transferred to the Geophysical Institute of Peru (IGP). The parabolic antenna was constructed in 1984 by Nippon Electric Co. (NEC) and worked as an INTELSAT station until 2000. A team of the National Observatory of Japan (NAOJ) evaluated the antenna in 2003 and reported its availability to be used as a Radio Telescope. In collaboration of the NAOJ a 6.7 GHz receiver is under construction and will be installed within this year. Initially the telescope as a single dish will monitor and survey Methanol Maser of YSO, higher frequencies equipment and VLBI instruments will be considered. The antenna will be managed by the IGP and used by universities in Peru, becoming a VLBI station will be a grate contribution to astronomy and geodetic community., Comment: 2 pages. 1 figure. Proceedings of the 7th European VLBI Network Symposium held in Toledo, Spain on October 12-15, 2004. Editors: R. Bachiller, F. Colomer, J.-F. Desmurs, P. de Vicente (Observatorio Astronomico Nacional), p. 295-296. Needs evn2004.cls

Published
2005

4. Effect of a magnetic field on the spin- and charge-density wave order in La1.45Nd0.4Sr0.15CuO4

Author

Wakimoto, S., Birgeneau, R. J., Fujimaki, Y., Ichikawa, N., Kasuga, T., Kim, Y. J., Kojima, K. M., Lee, S. -H., Niko, H., Tranquada, J. M., Uchida, S., and Zimmermann, M. v.

Subjects
Condensed Matter - Superconductivity
Abstract

The spin-density wave (SDW) and charge-density wave (CDW) order in superconducting La1.45Nd0.4Sr0.15CuO4 were studied under an applied magnetic field using neutron and X-ray diffraction techniques. In zero field, incommensurate (IC) SDW order appears below ~ 40 K, which is characterized by neutron diffraction peaks at (1/2 +/- 0.134, 1/2 +/- 0.134, 0). The intensity of these IC peaks increases rapidly below T_Nd ~ 8 K due to an ordering of the Nd^3+ spins. The application of a 1 T magnetic field parallel to the c-axis markedly diminishes the intensity below T_Nd, while only a slight decrease in intensity is observed at higher temperatures for fields up to 7 T. Our interpretation is that the c-axis field suppresses the parasitic Nd^3+ spin order at the incommensurate wave vector without disturbing the stripe order of Cu^2+ spins. Consistent with this picture, the CDW order, which appears below 60 K, shows no change for magnetic fields up to 4 T. These results stand in contrast to the significant field-induced enhancement of the SDW order observed in superconducting La2-xSrxCuO4 with x ~ 0.12 and stage-4 La2CuO4+y. The differences can be understood in terms of the relative volume fraction exhibiting stripe order in zero field, and the collective results are consistent with the idea that suppression of superconductivity by vortices nucleates local patches of stripe order., Comment: 7 pages, 5 figures

Published
2002
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5. Deep Impact: Observations from a Worldwide Earth-Based Campaign

Author

Meech, K. J., Ageorges, N., Arpigny, C., Ates, A., Aycock, J., Bagnulo, S., Bailey, J., Barber, R., Barrera, L., Barrena, R., Bauer, J. M., Belton, M. J. S., Bensch, F., Bhattacharya, B., Biver, N., Blake, G., Bockelée-Morvan, D., Boehnhardt, H., Bonev, B. P., Bonev, T., Buie, M. W., Burton, M. G., Butner, H. M., Cabanac, R., Campbell, R., Campins, H., Capria, M. T., Carroll, T., Chaffee, F., Charnley, S. B., Cleis, R., Coates, A., Cochran, A., Colom, P., Conrad, A., Coulson, I. M., Crovisier, J., deBuizer, J., Dekany, R., de Léon, J., Russo, N. Dello, Delsanti, A., DiSanti, M., Drummond, J., Dundon, L., Etzel, P. B., Farnham, T. L., Feldman, P., Fernández, Y. R., Filipovic, M. D., Fisher, S., Fitzsimmons, A., Fong, D., Fugate, R., Fujiwara, H., Fujiyoshi, T., Furusho, R., Fuse, T., Gibb, E., Groussin, O., Gulkis, S., Gurwell, M., Hadamcik, E., Hainaut, O., Harker, D., Harrington, D., Harwit, M., Hasegawa, S., Hergenrother, C. W., Hirst, P., Hodapp, K., Honda, M., Howell, E. S., Hutsemékers, D., Iono, D., Jackson, W., Jehin, E., Jiang, Z. J., Jones, G. H., Jones, P. A., Kadono, T., Kamath, U. W., Käufl, H. U., Kasuga, T., Kawakita, H., Kelley, M. S., Kerber, F., Kidger, M., Kinoshita, D., Knight, M., Lara, L., Larson, S. M., Lederer, S., Levasseur-Regourd, A. C., Li, J. Y., Licandro, J., Lisse, C. M., LoCurto, G., Lovell, A. J., Lowry, S. C., Lyke, J., Lynch, D., Ma, J., Magee-Sauer, K., Maheswar, G., Manfroid, J., Marco, O., Martin, P., Melnick, G., Miller, S., Miyata, T., Moriarty-Schieven, G. H., Moskovitz, N., Mueller, B. E. A., Mumma, M. J., Muneer, S., Neufeld, D. A., Ootsubo, T., Osip, D., Pandea, S. K., Pantin, E., Paterno-Mahler, R., Patten, B., Penprase, B. E., Peck, A., Petitas, G., Pinilla-Alonso, N., Pittichova, J., Pompei, E., Prabhu, T. P., Qi, C., Rao, R., Rauer, H., Reitsema, H., Rodgers, S. D., Rodriguez, P., Ruane, R., Ruch, G., Rujopakarn, W., Sahu, D. K., Sako, S., Sakon, I., Samarasinha, N., Sarkissian, J. M., Saviane, I., Schirmer, M., Schultz, P., Schulz, R., Seitzer, P., Sekiguchi, T., Selman, F., Serra-Ricart, M., Sharp, R., Snell, R. L., Snodgrass, C., Stallard, T., Stecklein, G., Sterken, C., Stüwe, J. A., Sugita, S., Sumner, M., Suntzeff, N., Swaters, R., Takakuwa, S., Takato, N., Thomas-Osip, J., Thompson, E., Tokunaga, A. T., Tozzi, G. P., Tran, H., Troy, M., Trujillo, C., Van Cleve, J., Vasundhara, R., Vazquez, R., Vilas, F., Villanueva, G., von Braun, K., Vora, P., Wainscoat, R. J., Walsh, K., Watanabe, J., Weaver, H. A., Weaver, W., Weiler, M., Weissman, P. R., Welsh, W. F., Wilner, D., Wolk, S., Womack, M., Wooden, D., Woodney, L. M., Woodward, C., Yamashita, T., Yang, B., Yokogawa, S., Zook, A. C., Zauderer, A., Zhao, X., and Zhou, X.

Published
2005

6. Subaru Telescope Observations of Deep Impact

Author

Sugita, S., Ootsubo, T., Kadono, T., Honda, M., Sako, S., Miyata, T., Sakon, I., Yamashita, T., Kawakita, H., Fujlwara, H., Fujiyoshi, T., Takato, N., Fuse, T., Watanabe, J., Furusho, R., Hasegawa, S., Kasuga, T., Sekiguchi, T., Kinoshita, D., Meech, K. J., Wooden, D. H., and Ip, W. H.

Published
2005

14. Magnetic shielding effect by complex structure with HTS pipes and ferrite powder on HTS current lead

Author

Nakamura, K., Kasuga, T., Abe, Y., and Inukai, E.

Subjects
Magnetic shielding -- Research, High temperature superconductivity -- Research, Business, Electronics, Electronics and electrical industries
Abstract

The magnetic shielding of high-temperature superconducting (HTS) current leads is proposed as a means of achieving high permeability and low thermal conductivity between superconducting magnets and HTS current leads. To this end, a structure consisting of Bi-Sr-Ca-Cu pipes and ferrite powder padding was constructed. Upon insertion of HTS leads, the critical current increase and magnetic flux densities of the innermost HTS pipe were measured.

Published
1995

19. はやぶさ２探査対象小惑星地上観測キャンペーンによって得られた(162173) 1999 JU3の姿

Author

Abe, Masanao, Kawakami, K., Hasegawa, S., Kuroda, D., Yoshikawa, M., Kasuga, T., Kitazato, K., Sarugaku, Y., Kinoshita, D., Miyasaka, S., Urakawa, S., Okumura, S., Takagi, Y., Takato, N., Fujiyoshi, T., Terada, H., Wada, T., Ita, Y., Vilas, F., Weissman, P. R., Choi, Y.-J., Larson, S., Bus, S. J., Tokunaga, A., Muller, T. G., 安部, 正真, 川上, 恭子, 長谷川, 直, 黒田, 大介, 吉川, 真, 春日, 敏測, 北里, 宏平, 猿楽, 祐樹, 木下, 大輔, 宮坂, 正大, 浦川, 聖太郎, 高木, 靖彦, 高遠, 徳尚, 藤吉, 拓哉, 寺田, 宏, 和田, 武彦, 板, 由房, Abe, Masanao, Kawakami, K., Hasegawa, S., Kuroda, D., Yoshikawa, M., Kasuga, T., Kitazato, K., Sarugaku, Y., Kinoshita, D., Miyasaka, S., Urakawa, S., Okumura, S., Takagi, Y., Takato, N., Fujiyoshi, T., Terada, H., Wada, T., Ita, Y., Vilas, F., Weissman, P. R., Choi, Y.-J., Larson, S., Bus, S. J., Tokunaga, A., Muller, T. G., 安部, 正真, 川上, 恭子, 長谷川, 直, 黒田, 大介, 吉川, 真, 春日, 敏測, 北里, 宏平, 猿楽, 祐樹, 木下, 大輔, 宮坂, 正大, 浦川, 聖太郎, 高木, 靖彦, 高遠, 徳尚, 藤吉, 拓哉, 寺田, 宏, 和田, 武彦, and 板, 由房

Abstract

会議情報: 第8回宇宙科学シンポジウム (2008年1月8日-9日. 宇宙航空研究開発機構宇宙科学研究本部(JAXA)(ISAS)相模原キャンパス), 相模原市, 神奈川県, 著者人数: 25名, Meeting Information: 8ｔh Space Science Symposium (January 8-9, 2008. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency(JAXA)(ISAS)Sagamihara Campus), Sagamihara, Kanagawa Japan

Published
2016

22. Thermo-physical properties of 162173 (1999 JU3), a potential flyby and rendezvous target for interplanetary missions

Author

Mueller, T. G., Durech, J., Weissman, P. R., Choi, Y-J., Larson, S., Hasegawa, Sunao, Abe, Masanao, Kawakami, Kyoko, Kasuga, T., Kinoshita, D., Kuroda, D., Urakawa, S., Okumura, S., Sarugaku, Y., Miyasaka, S., Takagi, Y., Yanagisawa, K., and Nagayama, S.

Subjects
Earth and Planetary Astrophysics (astro-ph.EP), Physics, Rendezvous, FOS: Physical sciences, Astronomy and Astrophysics, Context (language use), Astrophysics, Regolith, Photometry (optics), Space and Planetary Science, Geometric albedo, Asteroid, Orbit (dynamics), Interplanetary spaceflight, Astrophysics - Earth and Planetary Astrophysics
Abstract

著者人数：18名, Accepted: 2010-11-05, 資料番号: SA1002604000

Published
2011

23. SMART-1 Impact Ground-based campaign

Author

Ehrenfreund, P., Foing, B. H., Veillet, C., Wooden, D., Gurvits, L., Cook, A. C., Koschny, D., Biver, N., Buckley, D., Ortiz, J. L., Di Martino, M., Dantowitz, R., Cooke, B., Reddy, V., Wood, M., Vennes, S., Albert, L., Sugita, S., Kasuga, T., Meech, K., Tokunaga, A., Lucey, P., Krots, A., Palle, E., Montanes, P., Trigo-Rodriguez, J., Cremonese, G., Barbieri, C., Ferri, F., Mangano, V., Bhandari, N., Chandrasekhar, T., Kawano, N., Matsumoto, K., Taylor, C., Hanslmeyer, A., Vaubaillon, J., Schultz, R., Erd, C., Gondoin, P., Levasseur-Regourd, A.-C., Khodachenko, M., Rucker, H., Burchell, M., Cole, M., Svedhem, H., Rossi, A., Colaprete, T., Goldstein, D., Schultz, P. H., Alkalai, L., Banerdt, B., Kato, M., Graham, F., Ball, A., Taylor, E., Baldwin, E., Berezhnoy, A., Lammer, H., Talevi, M., Landeau-Constantin, J., Weyhe, B. v., Ansari, S., Lawton, C., Lebreton, J. P., Friedman, L., Betts, B., Buoso, M., Williams, S., Cirou, A., David, L., Sanguy, O., Burke, J. D., Maley, P. D., de Morais, V. M., Marchis, F., Munoz, J. M. H., and Dighay, J.-L.

Abstract

Based on predictions of impact magnitude and cloud ejecta dynamics, we organized a SMART-1 ground-based observation campaign to perform coordinated measurements of the impact. Results from the coordinated multi-site campaign will be discussed.

Published
2007

24. Experimental and Natural Induction of de novo Centriole Formation

Author

Kasuga Takumi and Daiju Kitagawa

Subjects
centrosome, centriole, de novo centriole formation, PLK4, multicilia, Biology (General), QH301-705.5
Abstract

In cycling cells, new centrioles are assembled in the vicinity of pre-existing centrioles. Although this canonical centriole duplication is a tightly regulated process in animal cells, centrioles can also form in the absence of pre-existing centrioles; this process is termed de novo centriole formation. De novo centriole formation is triggered by the removal of all pre-existing centrioles in the cell in various manners. Moreover, overexpression of polo-like kinase 4 (Plk4), a master regulatory kinase for centriole biogenesis, can induce de novo centriole formation in some cell types. Under these conditions, structurally and functionally normal centrioles can be formed de novo. While de novo centriole formation is normally suppressed in cells with intact centrioles, depletion of certain suppressor proteins leads to the ectopic formation of centriole-related protein aggregates in the cytoplasm. It has been shown that de novo centriole formation also occurs naturally in some species. For instance, during the multiciliogenesis of vertebrate epithelial cells, massive de novo centriole amplification occurs to form numerous motile cilia. In this review, we summarize the previous findings on de novo centriole formation, particularly under experimental conditions, and discuss its regulatory mechanisms.

Published
2022
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25. Sex-linked transcriptional divergence in the hermaphrodite fungus Neurospora tetrasperma

Author

Samils, N., Gioti, A., Karlsson, M., Sun, Y.Y., Kasuga, T., Bastiaans, E., Wang, Z., Li, N., Townsend, J.P., Johannesson, H., Samils, N., Gioti, A., Karlsson, M., Sun, Y.Y., Kasuga, T., Bastiaans, E., Wang, Z., Li, N., Townsend, J.P., and Johannesson, H.

Abstract

In the filamentous ascomycete Neurospora tetrasperma, a large (approx. 7 Mbp) region of suppressed recombination surrounds the mating-type (mat) locus. While the remainder of the genome is largely homoallelic, this region of recombinational suppression, extending over 1500 genes, is associated with sequence divergence. Here, we used microarrays to examine how the molecular phenotype of gene expression level is linked to this divergent region, and thus to the mating type. Culturing N. tetrasperma on agar media that induce sexual/female or vegetative/male tissue, we found 196 genes significantly differentially expressed between mat A and mat a mating types. Our data show that the genes exhibiting mat-linked expression are enriched in the region genetically linked to mating type, and sequence and expression divergence are positively correlated. Our results indicate that the phenotype of mat A strains is optimized for traits promoting sexual/female development and the phenotype of mat a strains for vegetative/male development. This discovery of differentially expressed genes associated with mating type provides a link between genotypic and phenotypic divergence in this taxon and illustrates a fungal analogue to sexual dimorphism found among animals and plants.

Published
2013

26. Phenotypic diversification is associated with host-induced transposon derepression in the sudden oak death pathogen Phytophthora ramorum

Author

Kasuga, T., Kozanitas, M., Bui, M., Hüberli, D., Rizzo, D.M., Garbelotto, M., Kasuga, T., Kozanitas, M., Bui, M., Hüberli, D., Rizzo, D.M., and Garbelotto, M.

Abstract

The oomycete pathogen Phytophthora ramorum is responsible for sudden oak death (SOD) in California coastal forests. P. ramorum is a generalist pathogen with over 100 known host species. Three or four closely related genotypes of P. ramorum (from a single lineage) were originally introduced in California forests and the pathogen reproduces clonally. Because of this the genetic diversity of P. ramorum is extremely low in Californian forests. However, P. ramorum shows diverse phenotypic variation in colony morphology, colony senescence, and virulence. In this study, we show that phenotypic variation among isolates is associated with the host species from which the microbe was originally cultured. Microarray global mRNA profiling detected derepression of transposable elements (TEs) and down-regulation of crinkler effector homologs (CRNs) in the majority of isolates originating from coast live oak (Quercus agrifolia), but this expression pattern was not observed in isolates from California bay laurel (Umbellularia californica). In some instances, oak and bay laurel isolates originating from the same geographic location had identical genotypes based on multilocus simples sequence repeat (SSR) marker analysis but had different phenotypes. Expression levels of the two marker genes analyzed by quantitative reverse transcription PCR were correlated with originating host species, but not with multilocus genotypes. Because oak is a nontransmissive dead-end host for P. ramorum, our observations are congruent with an epi-transposon hypothesis; that is, physiological stress is triggered on P. ramorum while colonizing oak stems and disrupts epigenetic silencing of TEs. This then results in TE reactivation and possibly genome diversification without significant epidemiological consequences. We propose the P. ramorum-oak host system in California forests as an ad hoc model for epi-transposon mediated diversification.

Published
2012

27. Study of the beam-photoelectron instability in BEPC

Author

Guo, Z Y, Huang, H, Li, S P, Liu, D K, Ma, L, Qin, Q, Wang, L F, Wang, J Q, Wang, S H, Zhang, C, Zhou, F, Chin, Y H, Fukuma, H, Hiramatsu, S, Izawa, M, Kasuga, T, Kikutani, E, Kobayashi, Y, Kurokawa, S, Ohmi, K, Sato, Y, Suetsugu, Y, Tobiyama, M, Yokoya, K, and Zhang, X L

Subjects
Accelerators and Storage Rings
Published
1998

28. Operation of the photon factory with a high brilliance optics

Author

Katoh, M, Hori, Y, Asaoka, S, Haga, K, Honda, T, Izawa, M, Kanaya, N, Kasuga, T, Katsura, T, Kobayashi, M, Kobayashi, Y, Maezawa, H, Mishina, A, Mitsuhashi, T, Nogami, T, Obina, T, Ohmi, K, Pak, C O, Sakanaka, S, Sato, Y, Shioya, T, Tadano, M, Takahashi, T, Tanimoto, Y, Tsuchiya, K, Uchiyama, T, and Ueda, A

Subjects
Accelerators and Storage Rings
Published
1998

31. Commissioning of the photon factory with a high brilliance optics

Author

Katoh, M, Hori, Y, Asaoka, S, Haga, K, Honda, T, Izawa, M, Kanaya, N, Kasuga, T, Katsura, T, Kobayashi, M, Kobayashi, Y, Maezawa, H, Mishina, A, Mitsuhashi, T, Nogami, T, Obina, T, Ohmi, K, Pak, C O, Sakanaka, S, Sato, Y, Shioya, T, Tadano, M, Takahashi, T, Tanimoto, Y, Tsuchiya, K, Uchiyama, T, and Ueda, A

Subjects
Accelerators and Storage Rings
Published
1998

32. The KEKB injector linac

Author

Akemoto, M., primary, Arakawa, D., additional, Enomoto, A., additional, Fukuda, S., additional, Funakoshi, Y., additional, Furukawa, K., additional, Higo, T., additional, Honda, T., additional, Honma, H., additional, Iida, N., additional, Ikeda, M., additional, Kakihara, K., additional, Kamitani, T., additional, Kasuga, T., additional, Katagiri, H., additional, Kazakov, S., additional, Kikuchi, M., additional, Kobayashi, Y., additional, Koiso, H., additional, Kudou, N., additional, Kurashina, M., additional, Matsushita, H., additional, Matsumoto, T., additional, Matsumoto, S., additional, Michizono, S., additional, Mimashi, T., additional, Mitsuhashi, T., additional, Miura, T., additional, Miyajima, T., additional, Nagahashi, S., additional, Nakajima, H., additional, Nakao, K., additional, Obina, T., additional, Ogawa, Y., additional, Ohnishi, Y., additional, Ohsawa, S., additional, Oide, K., additional, Oogoe, T., additional, Satoh, M., additional, Shidara, T., additional, Shirakawa, A., additional, Suetake, M., additional, Sugimura, T., additional, Suwada, T., additional, Tadano, M., additional, Takenaka, T., additional, Tawada, M., additional, Ueda, A., additional, Yano, Y., additional, Yokoyama, K., additional, and Yoshida, M., additional

Published
2013
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33. Phase-specific gene expression underlying morphological adaptations of the dimorphic human pathogenic fungus, Coccidioides posadasii

Author

Johannesson, Henrik, Kasuga, T, Schaller, R A, Good, B, Gardner, M J, Townsend, J P, Cole, G T, Taylor, J W, Johannesson, Henrik, Kasuga, T, Schaller, R A, Good, B, Gardner, M J, Townsend, J P, Cole, G T, and Taylor, J W

Abstract

Coccidioides posadasii is a dimorphic fungal pathogen that grows as a Wlamentous saprobe in the soil and as endosporulating spheruleswithin the host. To identify genes speciWc to the pathogenic phase of Co. posadasii, we carried out a large-scale study of gene expression intwo isolates of the species. From the sequenced Co. posadasii genome, we chose 1000 open reading frames to construct a 70-mer microarray.RNA was recovered from both isolates at three life-cycle phases: hyphae, presegmented spherules, and spherules releasing endospores.Comparative hybridizations were conducted in a circuit design, permitting comparison between both isolates at all three life-cyclephases, and among all life-cycle phases for each isolate. By using this approach, we identiWed 92 genes that were diVerentially expressedbetween pathogenic and saprobic phases in both fungal isolates, and 43 genes with consistent diVerential expression between the two parasiticdevelopmental phases. Genes with elevated expression in the pathogenic phases of both isolates included a number of genes thatwere involved in the response to environmental stress as well as in the metabolism of lipids. The latter observation is in agreement withprevious studies demonstrating that spherules contain a higher proportion of lipids than saprobic phase tissue. Intriguingly, we discoveredstatistically signiWcant and divergent levels of gene expression between the two isolates proWled for 64 genes. The results suggest thatincorporating more than one isolate in the experimental design oVers a means of categorizing the large collection of candidate genes thattranscriptional proWling typically identiWes into those that are strain-speciWc and those that characterize the entire species.

Published
2006
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34. Thermal desorption of Na in meteoroids Dependence on perihelion distance of meteor showers

Author

Kasuga, T., Yamamoto, T., Kimura, H., Watanabe, J., Kasuga, T., Yamamoto, T., Kimura, H., and Watanabe, J.

Abstract

Context.The observed sodium abundance of meteoroids in meteor showers might differ from the original abundance because of processing in interplanetary space after ejections from their parent bodies. Among various processes, thermal alteration of alkali silicate is most likely the major process of Na depletion. Aims.We clarify at which perihelion distances the thermal desorption alters the Na content of meteoroids that are observed as meteor showers. Methods.We compile Na abundances of meteoroids in meteor showers at each perihelion distance and compare them to the sublimation temperatures of alkali silicates. Results.Na abundances of meteoroids do not depend on their perihelion distances at AU. No Na depletion in these distances constrains the temperature of meteoroids at q=0.14 AU to be lower than the sublimation temperature of alkali silicates K. Conclusions.Meteoroid particles are characterized as large, compact, blackbody- like particles. On orbit with perihelion distances q < 0.1 AU, meteoroids would show evidence of thermal desorption of metals, in particular, Na.

Published
2006

36. The proposed experimental study on beam-photoelectron interactions in BEPC

Author

Guo, Z Y, Liu, D K, Ma, L, Wang, J Q, Wang, S H, Zhang, C, Zhou, F, Fukuma, H, Chin, Y H, Hiramatsu, S, Izawa, M, Kasuga, T, Kikutani, E, Kobayashi, Y, Kurokawa, S, Ohmi, K, Sato, Y, Suetsugu, Y, Tobiyama, M, Yokoya, K, and Zhang, X L

Subjects
Accelerators and Storage Rings
Published
1996

37. Deep Impact: Observation from a worldwide earth-based campaign

Author

Meech, K.J., Ageorges, N., A'Hearn, M.F., Arpigny, C., Ates, A., Aycock, J., Bagnulo, S., Bailey, J., Barber, R., Barrera, L., Barrena, R., Bauer, J.M., Belton, M.J.S., Bensch, F., Bhattacharya, B., Biver, N., Blake, G., Bockelee-Morvan, D., Boehnhardt, H., Bonev, B.P., Bonev, T., Buie, M.W., Burton, M.G., Butner, H.M., Cabanac, R., Campbell, R., Campins, H., Capria, M.T., Carroll, T., Chaffee, F., Charnley, S.B., Cleis, R., Coates, A., Cochran, A., Colom, P., Conrad, A., Coulson, I.M., Crovisier, J., DeBuizer, J., Dekany, R., De Leon, J., Dello Russo, N., Delsanti, A., DiSanti, M., Drummond, J., Dundon, L., Etzel, P.B., Farnham, T.L., Feldman, P., Fernandez, Y.R., Filipovic, M.D., Fisher, S., Fitzsimmons, A., Fong, D., Fugate, R., Fujiwara, H., Fujiyoshi, T., Furusho, R., Fuse, T., Gibb, E., Groussin, O., Gulkis, S., Gurwell, M., Hadamcik, E., Hainaut, O., Harker, D., Harrington, D., Harwit, M., Hasegawa, S., Hergenrother, C.W., Hirst, P., Hodapp, K., Honda, M., Howell, E.S., Hutsemekers, D., Iono, O., Ip, W.-H., Jackson, W., Jehin, E., Jiang, Z.J., Jones, G.H., Jones, P.A., Kadono, T., Kamath, U.W., Kaufl, H.U., Kasuga, T., Kawakita, H., Kelley, M.S., Kerber, F., Kidger, M., Kinoshita, D., Knight, M., Lara, L., Larson, S.M., Lederer, S., Lee, C.-F., Levasseur-Regourd, A.C., Li, J.Y., Li, Q.-S., Licandro, J., Lin, Z.-Y., Lisse, C.M., LoCurto, G., Lovell, A.J., Lowry, S.C., Lyke, J., Lynch, D., Ma, J., Magee-Sauer, K., Maheswar, G., Manfroid, J., Marco, O., Martin, P., Melnick, G., Miller, S., Miyata, T., Moriarty-Schieven, G.H., Moskovitz, N., Mueller, B.E.A., Mumma, M.J., Muneer, S., Neufeld, D.A., Ootsubo, T., Osip, D., Pandea, S.K., Pantin, E., Paterno-Mahler, R., Patten, B., Penprase, B.E., Peck, A., Petitas, G., Pinilla-Alonso, N., Pittichova, J., Pompei, E., Prabhu, T.P., Qi, C., Rao, R., Rauer, H., Reitsema, H., Rodgers, S.D., Rodriguez, P., Ruane, R., Ruch, G., Rujopakarn, W., Sahu, D.K., Sako, S., Sakon, I., Samarasinha, N., Sarkissian, J.M., Saviane, I., Schirmer, M., Schultz, P., Schulz, R., Seitzer, P., Sekiguchi, T., Selman, F., Serra-Ricart, M., Sharp, R., Snell, R.L., Snodgrass, C., Stallard, T., Stecklein, G., Sterken, C., Stuwe, J.A., Sugita, S., Sumner, M., Suntzeff, N., Swaters, R., Takakuwa, S., Takato, N., Thomas-Osip, J., Thompson, E., Tokunaga, A.T., Tozzi, G.P., Tran, H., Troy, M., Trujillo, C., Van Cleve, J., Vasundhara, R., Vazquez, R., Vilas, F., Villanueva, G., Von Braun, K., Vora, P., Wainscoat, R.J., Walsh, K., Watanabe, J., Weaver, H.A., Weaver, W., Weiler, M., Weissman, P.R., Welsh, W.F., Wilner, D., Wolk, S., Womack, M., Wooden, D., Woodney, L.M., Woodward, C., Wu, Z.-Y., Wu, J.-H., Yamashita, T., Yang, B., Yang, Y.-B., Yokogawa, S., Zook, A.C., Zauderer, A., Zhao, X., Zhou, X., Zucconi, J.-M., Meech, K.J., Ageorges, N., A'Hearn, M.F., Arpigny, C., Ates, A., Aycock, J., Bagnulo, S., Bailey, J., Barber, R., Barrera, L., Barrena, R., Bauer, J.M., Belton, M.J.S., Bensch, F., Bhattacharya, B., Biver, N., Blake, G., Bockelee-Morvan, D., Boehnhardt, H., Bonev, B.P., Bonev, T., Buie, M.W., Burton, M.G., Butner, H.M., Cabanac, R., Campbell, R., Campins, H., Capria, M.T., Carroll, T., Chaffee, F., Charnley, S.B., Cleis, R., Coates, A., Cochran, A., Colom, P., Conrad, A., Coulson, I.M., Crovisier, J., DeBuizer, J., Dekany, R., De Leon, J., Dello Russo, N., Delsanti, A., DiSanti, M., Drummond, J., Dundon, L., Etzel, P.B., Farnham, T.L., Feldman, P., Fernandez, Y.R., Filipovic, M.D., Fisher, S., Fitzsimmons, A., Fong, D., Fugate, R., Fujiwara, H., Fujiyoshi, T., Furusho, R., Fuse, T., Gibb, E., Groussin, O., Gulkis, S., Gurwell, M., Hadamcik, E., Hainaut, O., Harker, D., Harrington, D., Harwit, M., Hasegawa, S., Hergenrother, C.W., Hirst, P., Hodapp, K., Honda, M., Howell, E.S., Hutsemekers, D., Iono, O., Ip, W.-H., Jackson, W., Jehin, E., Jiang, Z.J., Jones, G.H., Jones, P.A., Kadono, T., Kamath, U.W., Kaufl, H.U., Kasuga, T., Kawakita, H., Kelley, M.S., Kerber, F., Kidger, M., Kinoshita, D., Knight, M., Lara, L., Larson, S.M., Lederer, S., Lee, C.-F., Levasseur-Regourd, A.C., Li, J.Y., Li, Q.-S., Licandro, J., Lin, Z.-Y., Lisse, C.M., LoCurto, G., Lovell, A.J., Lowry, S.C., Lyke, J., Lynch, D., Ma, J., Magee-Sauer, K., Maheswar, G., Manfroid, J., Marco, O., Martin, P., Melnick, G., Miller, S., Miyata, T., Moriarty-Schieven, G.H., Moskovitz, N., Mueller, B.E.A., Mumma, M.J., Muneer, S., Neufeld, D.A., Ootsubo, T., Osip, D., Pandea, S.K., Pantin, E., Paterno-Mahler, R., Patten, B., Penprase, B.E., Peck, A., Petitas, G., Pinilla-Alonso, N., Pittichova, J., Pompei, E., Prabhu, T.P., Qi, C., Rao, R., Rauer, H., Reitsema, H., Rodgers, S.D., Rodriguez, P., Ruane, R., Ruch, G., Rujopakarn, W., Sahu, D.K., Sako, S., Sakon, I., Samarasinha, N., Sarkissian, J.M., Saviane, I., Schirmer, M., Schultz, P., Schulz, R., Seitzer, P., Sekiguchi, T., Selman, F., Serra-Ricart, M., Sharp, R., Snell, R.L., Snodgrass, C., Stallard, T., Stecklein, G., Sterken, C., Stuwe, J.A., Sugita, S., Sumner, M., Suntzeff, N., Swaters, R., Takakuwa, S., Takato, N., Thomas-Osip, J., Thompson, E., Tokunaga, A.T., Tozzi, G.P., Tran, H., Troy, M., Trujillo, C., Van Cleve, J., Vasundhara, R., Vazquez, R., Vilas, F., Villanueva, G., Von Braun, K., Vora, P., Wainscoat, R.J., Walsh, K., Watanabe, J., Weaver, H.A., Weaver, W., Weiler, M., Weissman, P.R., Welsh, W.F., Wilner, D., Wolk, S., Womack, M., Wooden, D., Woodney, L.M., Woodward, C., Wu, Z.-Y., Wu, J.-H., Yamashita, T., Yang, B., Yang, Y.-B., Yokogawa, S., Zook, A.C., Zauderer, A., Zhao, X., Zhou, X., and Zucconi, J.-M.

Abstract

On 4 July 2005, many observatories around the world and in space observed the collision of Deep Impact with comet 9P/Tempel 1 or its aftermath. This was an unprecedented coordinated observational campaign. These data show that (i) there was new material after impact that was compositionally different from that seen before impact; (ii) the ratio of dust mass to gas mass in the ejecta was much larger than before impact; (iii) the new activity did not last more than a few days, and by 9 July the comet's behavior was indistinguishable from its pre-impact behavior; and (iv) there were interesting transient phenomena that may be correlated with cratering physics.

Published
2005

42. Thermo-physical properties of 162173 (1999 JU3), a potential flyby and rendezvous target for interplanetary missions

Author

Müller, T. G., primary, Ďurech, J., additional, Hasegawa, S., additional, Abe, M., additional, Kawakami, K., additional, Kasuga, T., additional, Kinoshita, D., additional, Kuroda, D., additional, Urakawa, S., additional, Okumura, S., additional, Sarugaku, Y., additional, Miyasaka, S., additional, Takagi, Y., additional, Weissman, P. R., additional, Choi, Y.-J., additional, Larson, S., additional, Yanagisawa, K., additional, and Nagayama, S., additional

Published
2010
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