Takeshi Sasaki

Derived Schwarz map of the hypergeometric differential equation and a parallel family of flat fronts (2007)

Sasaki, Takeshi, Yamada, Kotaro, Yoshida, Masaaki

In the previous paper (math.CA/0609196) we defined a map, called the hyperbolic Schwarz map, from the one-dimensional projective space to the three-dimensional hyperbolic space by use of solutions of...

Divergent Selection on Opsins Drives Incipient Speciation in Lake Victoria Cichlids (2006)

Yohey Terai, Ole Seehausen, Takeshi Sasaki, Kazuhiko Takahashi, Shinji Mizoiri, Tohru Sugawara, ...

Divergent natural selection acting on ecological traits, which also affect mate choice, is a key element of ecological speciation theory, but has not previously been demonstrated at the molecular...

Hyperbolic Schwarz map for the hypergeometric differential equation (2006)

Sasaki, Takeshi, Yamada, Kotaro, Yoshida, Masaaki

The Schwarz map of the hypergeometric differential equation is studied since the beginning of the last century. Its target is the complex projective line, the 2-sphere. This paper introduces the...

LINE CONGRUENCE AND TRANSFORMATION OF PROJECTIVE SURFACES (2006)

Sasaki, Takeshi, 佐々木, 武

The aim of this article is to present and reformulate systematically what is known about surfaces in the projective 3-space, in view of transformations of surfaces, and to complement this with some...

Invariant theory for linear differential systems modeled after the Grassmannian {${\rm Gr}(n,2n)$} (2003)

Sasaki, Takeshi, Yoshida, Masaaki

We find invariants for the differential systems of rank $2n$ in $n^{2}$ variables with $n$ unknowns under the linear changes of the unknowns with variable coefficients. We look for a set of...

A Geometric Study of the Hypergeometric Function With Imaginary Exponents (2001)

Takeshi Sasaki, Masaaki Yoshida

: The Schwarz map dened by the ratio of two solutions of the hypergeometric equation has been studied mainly when the exponents are real. In this paper, we study this map when the exponents are...

A Geometric Study of the Hypergeometric Function with Imaginary Exponents (2001)

Sasaki, Takeshi, Yoshida, Masaaki

The Schwarz map defined by the ratio of two solutions of the hypergeometric equation has been studied mainly when the exponents are real. In this paper, we study this map when the exponents are...

A Geometric Study of the Hypergeometric Function With Imaginary Exponents (2000)

Takeshi Sasaki, Masaaki Yoshida

: The Schwarz map dened by the ratio of two solutions of the hypergeometric equation has been studied mainly when the exponents are real. In this paper, we study this map when the exponents are...

A system of differential equations in 4 variables of rank 5 invariant under the Weyl group of type E 6 (2000)

Takeshi Sasaki, Masaaki Yoshida

This paper describes a detailed procedure of nding a system of dierential equations in 4 variables of rank 5 invariant under the Weyl group of type E 6 that is announced in [5]. This system is the...

A Geometric Study of the Hypergeometric Function With Imaginary Exponents (2000)

Takeshi Sasaki, Masaaki Yoshida

: The Schwarz map defined by the ratio of two solutions of the hypergeometric equation has been studied mainly when the exponents are real. In this paper, we study this map when the exponents are...

The uniformizing differential equation of the complex hyperbolic structure on the moduli space of marked cubic surfaces (1999)

Sasaki, Takeshi, Yoshida, Masaaki

We find the uniformizing equation, governing the developing map, of a complex hyperbolic structure on the (4-dimensional) moduli space of marked cubic surfaces. Our equation is invariant under the...

The Classification Of Projectively Homogeneous Surfaces Ii (1999)

Franki Dillen, Takeshi Sasaki, Luc Vrancken

This paper classifies locally projectively homogeneous surfaces in P

Dedicated to Professor Thomas James Willmore on the occasion of his seventy-seventh birthday Katsumi Nomizu and Takeshi Sasaki (1998)

Katsumi Nomizu, Takeshi Sasaki

We classify globally defined linear connections on the real line as well as on the circle up to diffeomorphisms. We also prove that such connections can be realized by affine immersions into the...

Sectional Curvature of Projective Invariant Metrics on a Strictly Convex Domain (1995)

Takeshi Sasaki, Takeshi Yagi

this paper we deal with the case where the domain is bounded and strictly convex and the boundary is smooth and show that the sectional curvatures of both metrics tend to 01 at the boundary, which is...

Affine immersion of n-dimensional manifold into R n+n(n+1)/2 and affine minimality (1995)

Takeshi Sasaki

this paper is generalizing this study to the case of n-dimensional submanifolds in R

Takeshi Sasaki and Takeshi Yagi (1995)

Takeshi Sasaki, Takeshi Yagi

this paper we deal with the case where the domain is bounded and strictly convex and the boundary is smooth and show that the sectional curvatures of both metrics tend to 01 at the boundary, which is...

Takeshi Sasaki and Takeshi Yagi (1995)

Takeshi Sasaki, Takeshi Yagi

this paper we deal with the case where the domain is bounded and strictly convex and the boundary is smooth and show that the sectional curvatures of both metrics tend to 01 at the boundary, which is...

N-Dimensional Manifold Into (1995)

Takeshi Sasaki

this paper is generalizing this study to the case of n-dimensional submanifolds in R

Abstracts. Appell's systems (1970)

Takeshi Sasaki

s. Appell's systems F 4 and F 2 of hypergeometric differential equations define surfaces in the projective 3-space. This paper will show the variety of such surfaces in view of projective...

Human parvovirus B19 as a causative agent for rheumatoid arthritis

Takahashi, Yuichi, Murai, Chihiro, Shibata, Shinobu, Munakata, Yasuhiko, Ishii, Tomonori, Ishii, Keiko, ...

Human parvovirus B19 (B19) DNA was detected in the synovial tissues in 30 of 39 patients with rheumatoid arthritis (RA), and infrequently in those with osteoarthritis and traumatic joints. On the...

Yeast Krr1p Physically and Functionally Interacts with a Novel Essential Kri1p, and Both Proteins Are Required for 40S Ribosome Biogenesis in the Nucleolus

Sasaki, Takeshi, Toh-e, Akio, Kikuchi, Yoshiko

Using a two-hybrid screening with TOM1, a putative ubiquitin-ligase gene of Saccharomyces cerevisiae, we isolated KRR1, a homologue of human HRB2 (for human immunodeficiency virus type 1 Rev-binding...

Regulation of Tumor Necrosis Factor Alpha Promoter by Human Parvovirus B19 NS1 through Activation of AP-1 and AP-2

Fu, Yi, Ishii, Keiko Kumura, Munakata, Yasuhiko, Saitoh, Takako, Kaku, Mitsuo, Sasaki, Takeshi

Human parvovirus B19 frequently causes acute and chronic arthritis in adults. The molecular mechanism of B19 arthritis, however, remains poorly understood. We previously showed that the transmission...

Acute Cytomegalovirus Infection and Transient Carotid Intimal-Medial Thickening in a Young, Otherwise Healthy Woman

Hirabayashi, Yasuhiko, Ishii, Tomonori, Kodera, Takao, Fujii, Hiroshi, Munakata, Yasuhiko, Sasaki, Takeshi

Carotid intimal-medial thickening was observed in a 23-year-old woman with acute cytomegalovirus (CMV) infection. The thickening disappeared after her recovery from the infection. As endothelial...

Human parvovirus B19 as a causative agent for rheumatoid arthritis

Takahashi, Yuichi, Murai, Chihiro, Shibata, Shinobu, Munakata, Yasuhiko, Ishii, Tomonori, Ishii, Keiko, ...

Human parvovirus B19 (B19) DNA was detected in the synovial tissues in 30 of 39 patients with rheumatoid arthritis (RA), and infrequently in those with osteoarthritis and traumatic joints. On the...

Yeast Krr1p Physically and Functionally Interacts with a Novel Essential Kri1p, and Both Proteins Are Required for 40S Ribosome Biogenesis in the Nucleolus

Sasaki, Takeshi, Toh-e, Akio, Kikuchi, Yoshiko

Using a two-hybrid screening with TOM1, a putative ubiquitin-ligase gene of Saccharomyces cerevisiae, we isolated KRR1, a homologue of human HRB2 (for human immunodeficiency virus type 1 Rev-binding...

Regulation of Tumor Necrosis Factor Alpha Promoter by Human Parvovirus B19 NS1 through Activation of AP-1 and AP-2

Fu, Yi, Ishii, Keiko Kumura, Munakata, Yasuhiko, Saitoh, Takako, Kaku, Mitsuo, Sasaki, Takeshi

Human parvovirus B19 frequently causes acute and chronic arthritis in adults. The molecular mechanism of B19 arthritis, however, remains poorly understood. We previously showed that the transmission...

Acute Cytomegalovirus Infection and Transient Carotid Intimal-Medial Thickening in a Young, Otherwise Healthy Woman

Hirabayashi, Yasuhiko, Ishii, Tomonori, Kodera, Takao, Fujii, Hiroshi, Munakata, Yasuhiko, Sasaki, Takeshi

Carotid intimal-medial thickening was observed in a 23-year-old woman with acute cytomegalovirus (CMV) infection. The thickening disappeared after her recovery from the infection. As endothelial...

Divergent Selection on Opsins Drives Incipient Speciation in Lake Victoria Cichlids

Terai, Yohey, Seehausen, Ole, Sasaki, Takeshi, Takahashi, Kazuhiko, Mizoiri, Shinji, Sugawara, Tohru, ...

Divergent natural selection acting on ecological traits, which also affect mate choice, is a key element of ecological speciation theory, but has not previously been demonstrated at the molecular...

Increased Expression of Elastolytic Cysteine Proteases, Cathepsins S and K, in the Neointima of Balloon-Injured Rat Carotid Arteries

Cheng, Xian Wu, Kuzuya, Masafumi, Sasaki, Takeshi, Arakawa, Koji, Kanda, Shigeru, Sumi, Daigo, ...

The matrix-degrading activity of several proteases are involved in the accelerated breakdown of extracellular matrix associated with vascular remodeling during the development of atherosclerosis and...

Localization of Cysteine Protease, Cathepsin S, to the Surface of Vascular Smooth Muscle Cells by Association with Integrin ανβ3

Cheng, Xian Wu, Kuzuya, Masafumi, Nakamura, Kae, Di, Qun, Liu, Zexuan, Sasaki, Takeshi, ...

Smooth muscle cell (SMC) migration from the tunica media to the intima, a key event in neointimal formation, requires proteolytic degradation of elastin-rich extracellular matrix barriers. Although...

Cytoplasmic destruction of p53 by the endoplasmic reticulum-resident ubiquitin ligase ‘Synoviolin'

Yamasaki, Satoshi, Yagishita, Naoko, Sasaki, Takeshi, Nakazawa, Minako, Kato, Yukihiro, Yamadera, Tadayuki, ...

Synoviolin, also called HRD1, is an E3 ubiquitin ligase and is implicated in endoplasmic reticulum -associated degradation. In mammals, Synoviolin plays crucial roles in various physiological and...

Possible involvement of SINEs in mammalian-specific brain formation

Sasaki, Takeshi, Nishihara, Hidenori, Hirakawa, Mika, Fujimura, Koji, Tanaka, Mikiko, Kokubo, Nobuhiro, ...

Retroposons, such as short interspersed elements (SINEs) and long interspersed elements (LINEs), are the major constituents of higher vertebrate genomes. Although there are many examples of...

Hepatocyte Nuclear Factor 4α Contributes to Thyroid Hormone Homeostasis by Cooperatively Regulating the Type 1 Iodothyronine Deiodinase Gene with GATA4 and Krüppel-Like Transcription Factor 9▿ †

Ohguchi, Hiroto, Tanaka, Toshiya, Uchida, Aoi, Magoori, Kenta, Kudo, Hiromi, Kim, Insook, ...

Type 1 iodothyronine deiodinase (Dio1), a selenoenzyme catalyzing the bioactivation of thyroid hormone, is highly expressed in the liver. Dio1 mRNA and enzyme activity levels are markedly reduced in...