72 Result(s)

Article

Numerical factorization of a polynomial by rational Hermite interpolation

We derive a class of iterative formulae to find numerically a factor of arbitrary degree of a polynomialf(x) based on the rational Hermite interpolation. The iterative formula generates the sequence of polynomial...

Tetsuya Sakurai, Hiroshi Sugiura, Tatsuo Torii in Numerical Algorithms (1992)

Article

On Factorization of Analytic Functions and Its Verification

An interval method for finding a polynomial factor of an analytic function f(z) is proposed. By using a Samelson-like method recursively, we obtain a sequence of polynomials that converges to a factor p*(z) of f(

Tetsuya Sakurai, Hiroshi Sugiura in Reliable Computing (2000)

Article

Monitoring the expression pattern of around 7,000 Arabidopsis genes under ABA treatments using a full-length cDNA microarray

Motoaki Seki, Junko Ishida, Mari Narusaka, Miki Fujita… in Functional & Integrative Genomics (2002)

Article

Monitoring the expression pattern of around 7,000 Arabidopsis genes under ABA treatments using a full-length cDNA microarray

Full-length cDNAs are essential for functional analysis of plant genes. Recently, cDNA microarray analysis has been developed for quantitative analysis of global and simultaneous analysis of expression profil...

Motoaki Seki, Junko Ishida, Mari Narusaka, Miki Fujita… in Functional & Integrative Genomics (2002)

Article

A method for finding the zeros of polynomials using a companion matrix

The zeros of a polynomial can be found by computing the eigenvalues of the corresponding companion matrix. However, in the case of multiple zeros, the calculated results are usually not as accurate as those fo...

**ao-Ming Niu, Tetsuya Sakurai in Japan Journal of Industrial and Applied Mathematics (2003)

Chapter

Transcriptome analysis in abiotic stress conditions in higher plants

Drought, high salinity, and low temperature are major environmental factors that limit plant productivity. Plants respond and adapt to these stresses in order to survive. Recent molecular and genetic studies h...

Motoaki Seki, Ayako Kamei, Masakazu Satou… in Plant Responses to Abiotic Stress (2004)

Article

Monitoring the expression profiles of genes induced by hyperosmotic, high salinity, and oxidative stress and abscisic acid treatment in Arabidopsis cell culture using a full-length cDNA microarray

Transcriptional regulation in response to hyperosmotic, high-salinity and oxidative stress, and abscisic acid (ABA) treatment in Arabidopsis suspension-cultured cell line T87 was investigated with a cDNA microarr...

Seiji Takahashi, Motoaki Seki, Junko Ishida, Masakazu Satou… in Plant Molecular Biology (2004)

Chapter and Conference Paper

A Parallel Method for Large Sparse Generalized Eigenvalue Problems by OmniRPC in a Grid Environment

In this paper we present a parallel method for finding several eigenvalues and eigenvectors of a generalized eigenvalue problem A x = λB x, where A and B are ...

Tetsuya Sakurai, Kentaro Hayakawa… in Applied Parallel Computing. State of the A… (2006)

Chapter and Conference Paper

A Hybrid Parallel Method for Large Sparse Eigenvalue Problems on a Grid Computing Environment Using Ninf-G/MPI

In the present paper, we propose a hybrid parallel method for large sparse eigenvalue problems in a grid computing environment. A moment-based method that finds several eigenvalues and their corresponding eige...

Tetsuya Sakurai, Yoshihisa Kodaki, Hiroaki Umeda… in Large-Scale Scientific Computing (2006)

Chapter and Conference Paper

Performance Improvement by Data Management Layer in a Grid RPC System

A grid RPC system provides a useful and intuitive programming interface for master-worker type applications in a grid environment. In many grid applications, such as parameter search programs, both master and ...

Yoshiaki Aida, Yoshihiro Nakajima… in Advances in Grid and Pervasive Computing (2006)

Article

Monitoring expression profiles of Arabidopsis genes during cold acclimation and deacclimation using DNA microarrays

A comparative analysis of gene expression profiles during cold acclimation and deacclimation is necessary to elucidate the molecular mechanisms of cold stress responses in higher plants. We analyzed gene expre...

Youko Oono, Motoaki Seki, Masakazu Satou, Kei Iida… in Functional & Integrative Genomics (2006)

Chapter and Conference Paper

A Master-Worker Type Eigensolver for Molecular Orbital Computations

We consider a parallel method for solving generalized eigenvalue problems that arise from molecular orbital computations. We use a moment-based method that finds several eigenvalues and their corresponding eig...

Tetsuya Sakurai, Yoshihisa Kodaki… in Applied Parallel Computing. State of the A… (2007)

Chapter and Conference Paper

On Single Precision Preconditioners for Krylov Subspace Iterative Methods

Large sparse linear systems Ax= b arise in many scientific applications. Krylov subspace iterative methods are often used for solving such linear systems. Preconditioning techniques are efficient to reduce the nu...

Hiroto Tadano, Tetsuya Sakurai in Large-Scale Scientific Computing (2008)