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Valerie Haggan-Ozaki, Tohru Ozaki, Yukihiro Toyoda
2006 IFAC Proceedings Volumes  
and Oda, 1978; Haggan and Ozaki, 1981) .  ...  The nonlinear behavior of y t and its relation to the RBF-ARX coefficients It may be shown (Ozaki and Oda, 1978; Haggan and Ozaki, 1981) that the nonlinear behavior of y t depends on the movement of  ... 
doi:10.3182/20060329-3-au-2901.00195 fatcat:jtsossdyujey3azqor3zd6qrxi

Akaike causality in state space

Kin Foon Kevin Wong, Tohru Ozaki
2007 Biological cybernetics  
We present a new approach of explaining partial causality in multivariate fMRI time series by a state space model. A given single time series can be divided into two noise-driven processes, which comprising a homogeneous process shared among multivariate time series and a particular process refining the homogeneous process. Causality map is drawn using Akaike noise contribution ratio theory, by assuming that noises are independent. The method is illustrated by an application to fMRI data recorded under visual stimulus.
doi:10.1007/s00422-007-0165-1 pmid:17579884 fatcat:546hdwkeqndpbhwmrrtcjnpg2e

Modeling and asset allocation for financial markets based on a discrete time microstructure model

Hui Peng, Tohru Ozaki, Valerie Haggan-Ozaki
2003 European Physical Journal B : Condensed Matter Physics  
Iino and Ozaki [7] proposed a set of continuous time stochastic differential equations following the approach of model (1) .  ...  Ozaki et al. [8] presented an asset allocation control method for foreign exchange based on the estimated excess demandφ t|t offered by model (2) .  ... 
doi:10.1140/epjb/e2003-00033-7 fatcat:k6fuorgwavez5iysjo4h7gvx3e

Adding data process feedback to the nonlinear autoregressive model

Hiroko Kato, Tohru Ozaki
2002 Signal Processing  
In a new approach in the nonlinear autoregressive approach of the statistical system analysis, Ozaki et al.  ... 
doi:10.1016/s0165-1684(02)00139-1 fatcat:kz6ghuifsvg2bf5ghs62s3th3i

Development of Detergent Enzymes

Susumu Ito, Tohru Kobayashi, Katsuya Ozaki
2000 Journal of Applied Glycoscience  
Ozaki, S. Kawai and Y. Hatada: Alkaline detergent enzymes from al kaliphiles: enzymatic properties, genetics, and struc  ... 
doi:10.5458/jag.47.243 fatcat:x5psjea3afdtbfwqugyy7a6vfe

Bombesin-like immunoreactivity in mammalian tissues

1980 Biomedical research  
Antiserum directed to the amphibian bombesin was raised in a guinea pig using the conjugate of N"-glycyl-[1-Glutamine]-bombesin with bovine serum albumin. The major immunologic determinant of this antiserum GP-3303 was shown to reside in the 6-7 sequence of bombesin. Bombesin-like immunoreactivities in gastrointestinal tissue extracts of the pig, dog, monkey, rat and guinea pig were found to be extremely low when measured by the present radioimmunoassay system using antiserum GP-3303. The
more » ... e gastrin releasing peptide recently isolated has the same decapeptide sequence as bombesin (5-14) in the C-terminal region except for the amino acid in position 7 of the bombesin molecule. The very low concentrations of bombesin-like immunoreactivity in the mammalian tissue extracts examined in the present study seem to reflect, at least in part, this amino acid substitution in the position corresponding to position 7 of bombesin, since the amino acid is involved in the major immunologic determinant of antiserum GP-3303. The present result also suggests that the bombesin-like immunoreactivity detected in mammalian tissues may be due to a new group of peptides in which the porcine gastrin releasing peptide is included. KEY WORDS bombesin-like immunoreactivity / porcine gastrin releasing peptide / radioimmunoassay
doi:10.2220/biomedres.1.96 fatcat:udn5gl5i6vcalfzdsduebpb6yu

A non-linear dynamic model for multiplicative seasonal-trend decomposition

Tohru Ozaki, Peter Thomson
2002 Journal of Forecasting  
Ozaki and P.  ...  A detailed discussion of techniques for non-linear dynamic model fitting and prediction is given in Ozaki et al. (1997) .  ...  Authors' biographies: Tohru Ozaki is currently a Professor of Statistics and Director of the Department of Prediction and Control at the Institute of Statistical Mathematics, Tokyo, Japan.  ... 
doi:10.1002/for.816 fatcat:r5j5wyc56jagxmapyxeovo2w7e

Detection method of isoflurane vapor using a cataluminescence-based gas sensor

Tohru Okabayashi, Masahiro Ozaki, Masuo Nakagawa
2011 Procedia Engineering  
We propose a new detection method based on cataluminescence (CTL) to detect isoflurane vapor, a typical anesthetic agent, continuously. The CTL of isoflurane vapor is observed during catalytic oxidation of isoflurane by the catalyst of -Al 2 O 3 activated with Tb 3+. This is the first observation of the CTL of the isoflurane vapor. The reproducible CTL response is observed at 600°C of catalyst temperature. The CTL intensity of isoflurane is proportional to the square root of the flow velocity
more » ... nging from 10.6 to 53.1 cm/s. This result directly shows that the rate of catalytic reaction emitting CTL is under the diffusion controlled conditions at 600°C. The CTL intensity of isoflurane is nearly proportional to the isoflurane concentration ranging from 10 to 50 ppm.
doi:10.1016/j.proeng.2011.12.269 fatcat:a6rauexjazb7rk5o6hg34ozayu

The Anti-Atherosclerotic Effects of Lipid Lowering with Atorvastatin in Patients with Hypercholesterolemia

Kazuyuki Ozaki, Takaaki Kubo, Ryuta Imaki, Hisahito Shinagawa, Hidehira Fukaya, Keita Ohtaki, Seiga Ozaki, Tohru Izumi, Yoshifusa Aizawa
2006 Journal of atherosclerosis and thrombosis  
We investigated the lipid lowering and anti-atherosclerotic effects of atorvastatin in patients with hypercholesterolemia. Thirty patients were given atorvastatin 10 mg daily, and assessed for serum lipids, intima-media thickness (IMT), and brachial-ankle pulse wave velocity (ba-PWV) at the baseline, 6 months, and 12 months. Remnant-like particle-cholesterol (RLP-C), lipoprotein (a) (Lp(a)), and high-sensitivity C-reactive protein (hs-CRP) were measured in some patients at the baseline and at 6
more » ... months. Total cholesterol, triglyceride and low-density lipoprotein cholesterol were significantly decreased by 32%, 23% and 44% at 6 months, respectively, and these effects were sustained at 12 months. There was no change in high-density lipoprotein cholesterol. IMT at the baseline was 0.88 0.16 mm and decreased to 0.76 0.13 mm at 6 months, remaining at 0.75 0.12 mm at 12 months. We did not observe any significant changes in ba-PWV. RLP-C and hs-CRP were significantly reduced from 7.3 10.8 mg/dL to 4.3 5.3 mg/dL and 0.075 0.065 mg/dL to 0.039 0.043 mg/dL at 6 months, respectively. There was no change in Lp(a). The observed decrease in IMT suggests that atorvastatin possibly improves atherosclerosis, in addition to the significant reduction of serum lipids. J Atheroscler Thromb, 2006; 13:216-219.
doi:10.5551/jat.13.216 pmid:16908955 fatcat:ym56pxe5c5enxj7wl4tuqnftni

Spinal Multiple Extradural Cyst

Yoshiyuki MASANA, Kazuo YAMADA, Koji OZAKI, Yukitaka USHIO, Tohru HAYAKAWA, Heitaro MOGAMI, Masaki MITOMO, Ryuji KAWAI
1986 Neurologia medico-chirurgica  
A case of spinal multiple extradural cyst is reported and reviewed. A 33-year-old male was admit ted to the Osaka University Hospital. He had suffered from spastic paraparesis for the previous 8
doi:10.2176/nmc.26.405 pmid:2429221 fatcat:dudrjx47bfalrg6lcli2gwvh7i

RBF-ARX model-based nonlinear system modeling and predictive control with application to a NOx decomposition process

Hui Peng, Tohru Ozaki, Yukihiro Toyoda, Hideo Shioya, Kazushi Nakano, Valerie Haggan-Ozaki, Masafumi Mori
2004 Control Engineering Practice  
All the model parameters are estimated off-line by applying a fastconverging structured nonlinear parameter optimization algorithm (Peng, Ozaki, Haggan-Ozaki, & Toyoda, 2002) .  ...  the internal model (or the multi-steppredictor in nonlinear MPC), a quasi-linear ARX model with working-point state-dependent exponential-function-style coefficients was used to design the MPC (Peng, Ozaki  ... 
doi:10.1016/s0967-0661(03)00050-9 fatcat:ystvxshcpvecbjbqqenegsi6gm


1986 DENSHI SHASHIN GAKKAISHI (Electrophotography)  
doi:10.11370/isjepj.25.178 fatcat:bxk6hvmtpnbzdbhfvwpzlexdda

GARCH modelling of covariance in dynamical estimation of inverse solutions

Andreas Galka, Okito Yamashita, Tohru Ozaki
2004 Physics Letters A  
The problem of estimating unobserved states of spatially extended dynamical systems poses an inverse problem, which can be solved approximately by a recently developed variant of Kalman filtering; in order to provide the model of the dynamics with more flexibility with respect to space and time, we suggest to combine the concept of GARCH modelling of covariance, well known in econometrics, with Kalman filtering. We formulate this algorithm for spatiotemporal systems governed by stochastic
more » ... ion equations and demonstrate its feasibility by presenting a numerical simulation designed to imitate the situation of the generation of electroencephalographic recordings by the human cortex.  2004 Elsevier B.V. All rights reserved. PACS: 02.30.Zz; 05.45.Tp; 95.75.Wx;
doi:10.1016/j.physleta.2004.10.045 fatcat:cpmw6lt4jnbh3jovd5ejl2lsje

Carbohydrate-Active Enzymes from Alkaliphiles

Susumu Ito, Tohru Kobayashi, Katsuya Ozaki, Kazuaki Igarashi, Hiroshi Hagihara, Yasuhiro Hayashi, Tadahiro Ozawa, Yuji Hatada, Shuji Kawai
2003 Journal of Applied Glycoscience  
The market in
doi:10.5458/jag.50.257 fatcat:7yj2asvl5vhaxkeknyv5jzvmbm

Graves' Disease with Unusual Histological Findings

Osamu OZAKI, Kunihiko ITO, Akira SUZUKI, Tohru YASHIRO, Yoshitaka MANABE, Yasuhiro HOSODA
1989 Folia Endocrinologica Japonica  
We reported three cases of Graves' disease which showed unusual histological findings featuring solid follicles, multinucleated giant cells and diffuse infiltration of histiocytes as well as lymphocytes in the whole section of the resected thyroid. Characteristics of these three cases were as follows: (1) Clinically, longer duration of the disease and exophthalmos were their prevailing findings. (2) On laboratory data, antimicrosomal antibody showed extremely high titers with 100,000 to
more » ... (3) Their operative findings were different from ordinary Graves' goiters in that colors of the goiter were yellow-red or gray-red, surface was rough and coarse, consistency was firm, and adhesions with the adjacent connective tissue were noted.
doi:10.1507/endocrine1927.65.10_1186 pmid:2591606 fatcat:zklellm2sba5xgz7vxswrakzpi
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