- Nomura, Y, Saito, S, Ishiwata, R, and Sugiyama, Y.
**Hopf bifurcation analysis for a dissipative system with asymmetric interaction: Analytical explanation of a specific property of highway traffic**.*Physical Review E*, American Physical Society, 93(1):012215, January 2016. [ DOI | http ] - Ishiwata, R and Sugiyama, Y.
**Flow instability originating from particle configurations using the two-dimensional optimal velocity model.***Physical Review E*, 92(6):062830, December 2015. [ DOI | http ] - Matsumae, H, Ishiwata, R, Minamoto, T, Ishida, N, Ogishima, S, and Tanaka, H.
**Detection of periodic patterns in microarray data reveals novel oscillating transcripts of biological rhythms in Ciona intestinalis**.*Artificial Life and Robotics*, Springer Japan, pages 1--6, November 2015. [ DOI | .html ] - Ishiwata, R, Kinukawa, R, and Sugiyama, Y.
**Analysis of motion of two-dimensional Optimal Velocity particles on simple maze using Kantorovich metric**. In*International Conference on Mathematical Modeling and Applications*. Tokyo, January 2015. - Ishiwata, R and Iwasa, M.
**Extracellular and intracellular factors regulating the migration direction of a chemotactic cell in traveling-wave chemotaxis.***Physical Biology*, IOP Publishing, 12(2):026004, 2015. [ DOI | http ] - Ishiwata, R, Kinukawa, R, and Sugiyama, Y.
**Analysis of motion of two-dimensional Optimal Velocity particles on simple maze using Kantorovich metric (in Japanese)**. In*Symposium on Simulation of Traffic Flow (In Japanese)*. Nagoya, December 2014. [ .pdf ] - Ishiwata, R and Sugiyama, Y.
**Quantitative Analysis for Quasi-Stable Pattern in the system of Optimal Velocity Model**. In*Joint Annual Meeting of the Japanese Society for Mathematical Biology and the Society for Mathematical Biology*. Osaka, July 2014. - Tanabe, M and Ishiwata, R.
**Swarm Oscillators - scenario of spiral aggregation - (in Japanese)**. In*JPS 69th Annual Meeting (in Japanese)*. March 2014. - Ishiwata, R, Tanabe, M, and Iwasa, M.
**Swarm Oscillators - non-equilibrium state with large number of particle - (in Japanese)**.*Meeting abstracts of the Physical Society of Japan*, 1:352, 2014. - Katayama, T, Wilkinson, MD, Micklem, G, Kawashima, S, Yamaguchi, A, Nakao, M,
Yamamoto, Y, Okamoto, S, Oouchida, K, Chun, HW, Aerts, J, Afzal, H, Antezana,
E, Arakawa, K, Aranda, B, Belleau, F, Bolleman, J, Bonnal, RJ, Chapman, B,
Cock, PJ, et al.
**The 3rd DBCLS BioHackathon: improving life science data integration with Semantic Web technologies.***Journal of Biomedical Semantics*, 4(1):6, 2013. [ DOI | http ] - Ishiwata, R and Sugiyama, Y.
**Relationships between power-law long-range interactions and fractional mechanics**.*Physica A: Statistical Mechanics and its Applications*, 391(23):5827--5838, December 2012. [ DOI | http ] - Iwasa, M and Ishiwata, R.
**Transition between Aggregation and Dispersion of Chemotactic Cells(in Japanese)**. In*Symposium on Simulation of Traffic Flow (In Japanese)*. Nagoya, December 2011. - Iwasa, M and Ishiwata, R.
**Phenomenological understanding of aggregation and dispersion of chemotactic cells**.*arXiv.org*, October 2011. [ arXiv | http ] - Ishiwata, R and Sugiyama, Y.
**Analysis of aggregation behavior with 2D OV model**. In*Symposium on Simulation of Traffic Flow (In Japanese)*. Nagoya, November 2010. - Ishiwata, R and Sugiyama, Y.
**Instability of Collective Flow in Two-Dimensional Optimal Velocity Model**. In*Natural Computing*, pages 191--198. Springer Japan, Tokyo, 2010. ISBN 978-4-431-53867-7. [ DOI | http ] - Ishiwata, R and Sugiyama, Y.
**Instability of Collective Flow in Two-Dimensional Optimal Velocity Model**.*Natural Computing*, Natural Computing, 2:191--198, 2010. [ http ] - Ishiwata, R and Sugiyama, Y.
**Array dependent instability of homogenous flow with two-dimensional OV model(in Japanese)**. In*Symposium on Simulation of Traffic Flow (In Japanese)*. Nagoya, December 2009. - Matsumae, H, Minamoto, T, Ishiwata, R, Hanai, S, Azumi, K, Ogishima, S, Tanaka,
H, and Satoh, N.
**Microarray analysis of circadian gene expressions in Ciona intestinalis**. In*The 5th International Tunicate meeting*. Okinawa, June 2009. - Ishiwata, R, Morioka, MS, Ogishima, S, and Tanaka, H.
**BioCichlid: central dogma-based 3D visualization system of time-course microarray data on a hierarchical biological network.***Bioinformatics (Oxford, England)*, Oxford University Press, 25(4):543--544, February 2009. [ DOI | http ] - Ishiwata, R and Sugiyama, Y.
**Relationships between models of long range power law interaction and mechanics containing fractional derivative(in Japanese)**. In*Symposium on Simulation of Traffic Flow (In Japanese)*. Nagoya, November 2008. - Morioka, MS, Ishiwata, R, Ogishima, S, Sone, T, Oshiro, S, and Tanaka, H.
**GSMTA: novel method of gene-set trend analysis for temporal gene expression data**. In*4th EMBO Conference From Functional Genomics to Systems Biology EMBL*. Heidelberg, November 2008. - Morioka, MS, Ishiwata, R, Ogishima, S, Oshiro, S, and Tanaka, H.
**Temporal gene expression analysis of hypoxia in human muscle cell**. In*The 8th International conference on system Biology*. California, October 2007. - Ishiwata, R.
*Mathematical modeling of emission of inducers of apoptosis*. Master's thesis, 2006.