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Your search keyword '"Ito, Takaaki"' showing total 1,531 results
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1,531 results on '"Ito, Takaaki"'

1. Homomorphisms between the semirings of Boolean functions on 1-dimensional tropical fans

Author

Ito, Takaaki

Subjects
Mathematics - Algebraic Geometry, 14T10, 15A80, 16Y60
Abstract

In a previous work, we stated the conjecture that any semiring homomorphism between the Boolean function semirings on 1-dimensional tropical fans has the property called geometric. In this paper, we show that the conjecture is true. As an application, we establish a way to find all the morphisms between given 1-dimensional tropical fans., Comment: 19 pages, 0 figures

Published
2024

2. Local theory of functions on tropical curves in $\mathbb R^n$

Author

Ito, Takaaki

Subjects
Mathematics - Algebraic Geometry, 14T10 (Primary) 15A80, 16Y60 (Secondary)
Abstract

We first develop the local theory of functions on $\mathbb R^n$ defined by tropical Laurent polynomials. We study the structure of the semiring of functions, where two functions are identified when they coincide on a neighborhood of a fixed point. We see that this semiring is closely related to the semiring of functions defined by Boolean Laurent polynomials. Then we develop the local theory of functions on tropical curves. We construct a contravariant functor from the category of 1-dimensional tropical fans to the category of certain homomorphisms of semirings. As an application, we discuss about the smoothness of 1-dimensional tropical fans at the origin., Comment: 41 pages, 0 figures

Published
2022

10. Contributors

Author

Akaike, Takaaki, primary, Bilska-Wilkosz, Anna, additional, Buonvino, Silvia, additional, Cinotti, Giulia, additional, Hamid, Hisyam Abdul, additional, Hanaoka, Kenjiro, additional, Ito, Takaaki, additional, Kimura, Hideo, additional, Kovalchuk, Iryna, additional, Leimkühler, Silke, additional, Matsunaga, Tetsuro, additional, Melino, Sonia, additional, Nagahara, Noriyuki, additional, Ogasawara, Y., additional, Ogunkola, Moses Olalekan, additional, Pavlovskiy, Yaroslav, additional, Piłsyk, Sebastian, additional, Revenko, Oleh, additional, Sasaki, Eita, additional, Savytska, Maryana, additional, Takata, Tsuyoshi, additional, and Zayachkivska, Oksana, additional

Published
2023
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12. Overcoming problems caused by offset distance of multiple targets in single-isocenter volumetric modulated arc therapy planning for stereotactic radiosurgery

Author

Ito, Takaaki, Kubo, Kazuki, Monzen, Hajime, Yanagi, Yuya, Nakamura, Kenji, Sakai, Yusuke, and Nishimura, Yasumasa

Subjects
Varian Medical Systems Inc., Medical test kit industry, Medical equipment and supplies industry, Radiosurgery, Surgery, Health
Abstract

Byline: Takaaki. Ito, Kazuki. Kubo, Hajime. Monzen, Yuya. Yanagi, Kenji. Nakamura, Yusuke. Sakai, Yasumasa. Nishimura Purpose: The purpose of the study is to investigate the impact of large target offset [...]

Published
2023

13. Enhancing the use of exposure science across EU chemical policies as part of the European Exposure Science Strategy 2020–2030

Author

Bruinen de Bruin, Yuri, Franco, Antonio, Ahrens, Andreas, Morris, Alick, Verhagen, Hans, Kephalopoulos, Stylianos, Dulio, Valeria, Slobodnik, Jaroslav, Sijm, Dick T.H.M., Vermeire, Theo, Ito, Takaaki, Takaki, Koki, De Mello, Jonathas, Bessems, Jos, Zare Jeddi, Maryam, Tanarro Gozalo, Celia, Pollard, Kevin, McCourt, Josephine, and Fantke, Peter

Published
2022
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20. Confined placental mosaicism with trisomy 13 complicated by severe preeclampsia: A case report and literature review.

Author

Ito, Takaaki, Takahashi, Hironori, Horie, Kenji, Nagayama, Shiho, Ogoyama, Manabu, and Fujiwara, Hiroyuki

Abstract

A 31‐year‐old primiparous woman underwent non‐invasive prenatal testing. The result was trisomy 13 (T13) positive. The chromosome 13 t‐statistics (Z‐score) was significantly high. The result of amniocentesis was normal karyotype (46,XX). Detailed ultrasound showed no fetal structural abnormalities. We suspected T13 confined placental mosaicism (CPM) and observed the course naturally. From the late second trimester, severe fetal growth restriction manifested followed by proteinuria and hypertension, diagnosing her with preeclampsia (PE). At 35 + 5 weeks, emergent cesarean section was required, yielding a 1480 g female infant. We sampled five locations of chorionic villi in the placenta. T13 cells dominated cells with normal karyotypes in all parts and the rate of trisomic cells ranged from 57% to 96%, which were generally high rate. None developed PE in reported T13 CPM cases and this is the first case of PE. The dominancy of T13 cells can be associated with PE development. [ABSTRACT FROM AUTHOR]

Published
2024
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21. Surgical and orthodontic management of an ankylosed mandibular molar with a single-tooth dento-osseous osteotomy: A case report.

Author

Aoki, Noriaki, Matsumoto, Megumi, Ishii, Soichiro, Baba, Junichi, Ito, Takaaki, and Honda, Aya

Abstract

Most of the previous studies have reported the treatment of ankylosed anterior teeth with surgical luxation. To the best of our knowledge, this is the first report in the English literature about the treatment of a mandibular first permanent molar with a single-tooth dento-osseous osteotomy. We report a case of surgical treatment and perioperative management of an ankylosed mandibular molar with a single-tooth dento-osseous osteotomy. [ABSTRACT FROM AUTHOR]

Published
2024
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39. Development of Polyvinyl Alcohol (PVA) Nanofibers Containing Cationic Lipid/siRNA Complexes via Electrospinning: The Impact of PVA Characterization.

Author

Kanamori, Miyu, Hara, Kouji, Yamazoe, Eriko, Ito, Takaaki, and Tahara, Kohei

Subjects
CATIONIC lipids, POLYVINYL alcohol, NANOFIBERS, SMALL interfering RNA, RNA interference, GENE expression
Abstract

This study aimed to develop polyvinyl alcohol (PVA) nanofibers encapsulating 1,2-dioleoyl-3-trimethylammonium-propane (DOTAP)/siRNA complexes via electrospinning for the delivery of nucleic acid-based drugs. It also focused on the influence of the intrinsic properties of PVA on the efficacy of the system. PVA nanofibers, with diameters of 300–400 nm, were obtained, within which the siRNA remained intact and the DOTAP/siRNA complexes were uniformly dispersed. By incorporating DOTAP/siRNA complexes into the PVA nanofibers and assessing the impact of their RNA interference (RNAi) activity in A549-Luc cells, a stable inhibition of luciferase expression was observed. An examination of the nanofiber preparation process revealed that even when DOTAP or siRNA were added separately to the PVA solution without forming complexes, the RNAi effect was retained. The DOTAP/siRNA complexes released from the PVA nanofibers were internalized by the cells, with some PVA residues remaining on their surfaces. The significance of the degree of hydrolysis and polymerization of PVA on the performance of nanofibers was highlighted. Notably, PVA with a low degree of hydrolysis substantially enhanced RNAi effects, with luciferase expression inhibition reaching 91.5 ± 0.7%. Nanofibers made of PVA grades with anionic or cationic modifications were also evaluated, suggesting that they affect the efficacy of siRNA delivery. The insights obtained suggest avenues for future research to optimize drug delivery systems further. [ABSTRACT FROM AUTHOR]

Published
2024
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