KOYAMADA Koji

J-GLOBAL         Last updated: May 21, 2019 at 02:40
 
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Name
KOYAMADA Koji
Affiliation
Kyoto University
Section
Academic Center for Computing and Media Studies Department of Computing Research
Job title
Professor,Professor
Degree
Doctor of Engineering(Kyoto University), Master of Engineering

Research Interests

 
 

Research Areas

 
 

Academic & Professional Experience

 
1985
 - 
1998
IBM Japan, Researcher
 
1998
 - 
2001
Iwate Prefectural University, Associate Professor
 

Education

 
 
 - 
1985
Graduate School, Division of Engineering, Kyoto University
 
 
 - 
1983
Faculty of Engineering, Kyoto University
 

Committee Memberships

 
2006
   
 
The Visualization Society of Japan  
 
2006
   
 
Japan Society for Simulation Technology  
 

Published Papers

 
Junxiong Ni, Kun Zhao, Tohru Nakanishi, Koji Koyamada
JOURNAL OF ADVANCED SIMULATION IN SCIENCE AND ENGINEERING   4(1)    2018   [Refereed]
Yasuo Ebara, Yuma Hayashida, Tomoya Uetsuji, Koji Koyamada
COMPUTATIONAL SCIENCE/INTELLIGENCE AND APPLIED INFORMATICS   726    2018   [Refereed]
Hideo Miyachi, Isamu Kuroki, Daisuke Matsuoka, Koji Koyamada
ADVANCES IN NETWORK-BASED INFORMATION SYSTEMS, NBIS-2017   7    2018   [Refereed]
Junxiong Ni, Tie Shen, Yasuo Ebara, Koji Koyamada, Yoichi Kawakami, Yuichi Nakamura
JOURNAL OF ADVANCED SIMULATION IN SCIENCE AND ENGINEERING   4(1)    2018   [Refereed]
Yukio Yasuhara, Naohisa Sakamoto, Yasuo Ebara, Hiroshi Katao, Koji Koyamada
JOURNAL OF ADVANCED SIMULATION IN SCIENCE AND ENGINEERING   4(1)    2018   [Refereed]
Koji Koyamada, Yosuke Onoue, Miki Kioka, Tomoya Uetsuji, Kazutaka Baba
JOURNAL OF VISUALIZATION   21(2)    Apr 2018   [Refereed]
INTERACTIVE VISUALIZATION OF LARGE-SCALE 3D SCATTERED DATA FROM A TSUNAMI SIMULATION
Kun Zhao, Sakamoto Naohisa, Koji Koyamada, Satoshi Tanaka, Kohei Murotani, Seiichi Koshizuka
INTERNATIONAL JOURNAL OF INDUSTRIAL ENGINEERING-THEORY APPLICATIONS AND PRACTICE   24(2)    2017   [Refereed]
Quasi-biclique Edge Concentration: A Visual Analytics Method for Biclustering
Yosuke Onoue, Koji Koyamada
2017 IEEE PACIFIC VISUALIZATION SYMPOSIUM (PACIFICVIS)      2017   [Refereed]
Using Interactive Particle-based Rendering to Visualize a Large-scale Time-varying Unstructured Volume with Mixed Cell Types
Kun Zhao, Naohisa Sakamoto, Koji Koyamada
2017 IEEE PACIFIC VISUALIZATION SYMPOSIUM (PACIFICVIS)      2017   [Refereed]
Jorji Nonaka, Naohisa Sakamoto, Takashi Shimizu, Masahiro Fujita, Kenji Ono, Koji Koyamada
2017 INTERNATIONAL CONFERENCE ON HIGH PERFORMANCE COMPUTING & SIMULATION (HPCS)      Jul 2017   [Refereed]
Yuma Hayashida, Tomoya Uetsuji, Yasuo Ebara, Koji Koyamada
2017 NICOGRAPH INTERNATIONAL (NICOINT)      Jun 2017   [Refereed]
Yosuke Onoue, Nobuyuki Kukimoto, Naohisa Sakamoto, Kazuo Misue, Koji Koyamada
IEEE COMPUTER GRAPHICS AND APPLICATIONS   37(2)    Mar 2017   [Refereed]
Yosuke Onoue, Nobuyuki Kukimoto, Naohisa Sakamoto, Koji Koyamada
IEEE TRANSACTIONS ON VISUALIZATION AND COMPUTER GRAPHICS   22(6)    Jun 2016
Hideo Miyachi, Naohisa Sakamoto, Koji Koyamada
ARTIFICIAL LIFE AND ROBOTICS   21(1)    Mar 2016
Kun Zhao, Satoshi Nakada, Naohisa Sakamoto, Koji Koyamada
JOURNAL OF VISUALIZATION   18(4)    Nov 2015
Human-Centered Data Visualization
Xiaoru Yuan, Baoquan Chen, Koji Koyamada, Issei Fujishiro
IEEE COMPUTER GRAPHICS AND APPLICATIONS   35(6)    Nov 2015
Kun Zhao, Satoshi Nakada, Naohisa Sakamoto, Koji Koyamada, Chandrajit Bajaj, Yoichi Ishikawa, Toshiyuki Awaji, Teiji In, Sei-Ichi Saitoh
INTERNATIONAL JOURNAL OF MODELING SIMULATION AND SCIENTIFIC COMPUTING   6(2)    Jun 2015
Kun Zhao, Naohisa Sakamoto, Koji Koyamada
JOURNAL OF VISUALIZATION   18(2)    May 2015   [Refereed]
Satoshi Nakada, Yoichi Ishikawa, Toshiyuki Awaji, Teiji In, Koji Koyamada, Masamichi Watanobe, Hiroya Okumura, Yoshinori Nishida, Sei-Ichi Saitoh
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS   118(7)    Jul 2013   [Refereed]
Naohisa Sakamoto, Naoya Maeda, Takuma Kawamura, Koji Koyamada
JOURNAL OF VISUALIZATION   16(2)    May 2013   [Refereed]
A Volume Compression Scheme Based on Block Division with Fast Cubic B-spline Evaluation
Kun Zhao, Naohisa Sakamoto, Koji Koyamada
ASIASIM 2012, PT III   325    2012   [Refereed]
Detection of Linear Relationship among Dimensions in Multivariate Data by Parallel Coordinates
Chi Zhang, Naohisa Sakamoto, Koji Koyamada
ASIASIM 2012, PT I   323    2012   [Refereed]
Particle-Based Volume Rendering of Remote Volume Datasets Using FlowVR
Allan Lorant, Alexandre Ancel, Kun Zhao, Naohisa Sakamoto, Koji Koyamada, Bruno Raffin
ASIASIM 2012, PT I   323    2012   [Refereed]
Extraction of Vortices and Exploration of the Ocean Data by Visualization System
Chi Zhang, Takashi Uenaka, Naohisa Sakamoto, Koji Koyamada
SYSTEM SIMULATION AND SCIENTIFIC COMPUTING, PT II   327    2012   [Refereed]
A Temporal Coherence Based Framework for Visualizing Time-Varying Unstructured Volume with PBVR
Kun Zhao, Naohisa Sakamoto, Koji Koyamada
ASIASIM 2012, PT I   323    2012   [Refereed]
Clustered Parallel Coordinates with High-Speed k-Means Algorithm and Out-of-Core Feature
Chi Zhang, Naohisa Sakamoto, Koji Koyamada
ADVANCED METHODS, TECHNIQUES, AND APPLICATIONS IN MODELING AND SIMULATION   4    2012   [Refereed]
Tiled Display Visualization System with Multi-touch Control
Jun Nishimura, Naohisa Sakamoto, Koji Koyamada
ADVANCED METHODS, TECHNIQUES, AND APPLICATIONS IN MODELING AND SIMULATION   4    2012   [Refereed]
A New Framework for Visualizing a Time-Varying Unstructured Grid Dataset with PBVR
Kun Zhao, Jun Nishimura, Naohisa Sakamoto, Koji Koyamada
ADVANCED METHODS, TECHNIQUES, AND APPLICATIONS IN MODELING AND SIMULATION   4    2012   [Refereed]
Computers & Graphics   34(1)    Feb 2010   [Refereed]
Computers & Graphics   34(1)    Feb 2010   [Refereed]
T Itoh, H Takakura, A Sawada, K Koyamada
IEEE COMPUTER GRAPHICS AND APPLICATIONS   26(2)    Mar 2006
J Nonaka, N Kukimoto, Y Ebara, M Ogata, T Iwashita, M Kanazawa, K Koyamada
IEICE TRANSACTIONS ON INFORMATION AND SYSTEMS   E88D(11)    Nov 2005
N Kukimoto, J Nonaka, Y Ebara, K Koyamada
JSME INTERNATIONAL JOURNAL SERIES B-FLUIDS AND THERMAL ENGINEERING   48(2)    May 2005
N Sakamoto, N Kukimoto, Y Yasuhara, Y Ebara, K Koyamada
JSME INTERNATIONAL JOURNAL SERIES B-FLUIDS AND THERMAL ENGINEERING   48(2)    May 2005

Misc

 
尾上洋介, 馬場一貴, 小山田耕二
可視化情報学会誌   38(151) 153‐157,134(4)   Oct 2018
Chi Zhang, Chi Zhang, Pu wen Lei, Koji Koyamada
Communications in Computer and Information Science   946 286-295   Jan 2018
© 2018, Springer Nature Singapore Pte Ltd. In this paper, we proposed an improved percentile method that used for calculating the threshold value of the extreme precipitation event. The method normalizes the series of daily precipitation data by B...
尾上洋介, 坂本尚久, 小山田耕二
応用数理   27(4) 160‐167   Dec 2017
高保健太, 尾上洋介, 小波秀雄, 真鍋勇一郎, 小山田耕二, 坂東昌子
可視化情報学会誌   37(Suppl.2(CD-ROM)) ROMBUNNO.GS4‐26   Nov 2017
小林沙織, 尾上洋介, 小山田耕二, 坪倉正治, 鳥居寛之, 宇野賀津子
可視化情報学会誌   37(Suppl.2(CD-ROM)) ROMBUNNO.GS3‐16   Nov 2017
宮地英生, 黒木勇, 松岡大祐, 小山田耕二
シミュレーション   36(3) 168‐169   Sep 2017
小山田耕二
日本機械学会計算力学講演会論文集(CD-ROM)   30th ROMBUNNO.F01‐6   Sep 2017
馬場一貴, 小山田耕二, 美馬秀樹
可視化情報学会誌   37(Suppl.1(CD-ROM)) ROMBUNNO.A203   Jul 2017
夏川浩明, 小山田耕二
可視化情報学会誌   37(Suppl.1(CD-ROM)) ROMBUNNO.B107   Jul 2017
梅澤浩然, 夏川浩明, 高山順, 尾上洋介, 大浪修一, 小山田耕二
可視化情報学会誌   37(Suppl.1(CD-ROM)) ROMBUNNO.B207   Jul 2017
尾上洋介, 今井晨介, 小山田耕二
可視化情報学会誌   37(Suppl.1(CD-ROM)) ROMBUNNO.B108   Jul 2017
学校健康診断情報の有効活用に向けた匿名データベース構築の取り組み
尾上 洋介, 中尾 彰宏, 粂 直人, 小山田 耕二, 川上 浩司
医療情報学   36(5) 221-229   Jan 2017
本研究では,学校保健安全法に基づいて毎年実施される学校健康診断(学校健診)の情報を有効活用するために,匿名データベースの構築の仕組みを開発した.本データベースは,生徒の健康意識向上,自治体における医療健康計画,疫学研究を通じた公衆衛生の向上などでの利用が期待される.本データベースは,データの受け入れからデータセットの利活用に関して,関連法制度や医学研究ガイドライン下で現実的に運用が可能なようにシステムおよび運用体制の構築を行っている.また,効率的な健診情報収集のために光学文字認識(OCR;...
Kun Zhao, Satoshi Nakada, Naohisa Sakamoto, Koji Koyamada, Chandrajit Bajaj, Yoichi Ishikawa, Toshiyuki Awaji, Teiji In, Sei Ichi Saitoh
International Journal of Modeling, Simulation, and Scientific Computing   6    Jun 2015
Using Interactive Particle-based Rendering to Visualize a Large-scale Unstructured Volume with Mixed Cell Types
Kun Zhao, Naohisa Sakamoto, Koji Koyamada
Proc. of IEEE Pacific Visualization 2015 (Poster)      Apr 2015   [Refereed]
Volume Rendering for 3D Scattered data with Interactive Particle-based Rendering
Kun Zhao, Naohisa Sakamoto, Koji Koyamada, Satoshi Tanaka, Kohei Murotani and Seiichi Koshizuka
In Proc. of International Conference on Systems Simulation (AsiaSim2015)      Nov 2015   [Refereed]
Text based visualization of evaluation structures using tag clouds
Keita Ozawa, Yosuke Onoue, Nobuyuki Kukimoto, Naohisa Sakamoto, Koji Koyamada
In Proc. of IEEE Pacific Visualization 2015 (Poster)      Apr 2015   [Refereed]
A Study on Communication Tools Using Evaluation Grid Method
Nobuyuki Kukimoto, Yosuke Onoue and Koji Koyamada
In Proc. of International Conference on Simulation Technology (JSST2015)   445-446   Oct 2015   [Refereed]
Lacrosse Vis: a visual analytics system for lacrosse players
Shinsuke Imai, Yosuke Onoue, Naohisa Sakamoto, Nobuyuki Kukimoto, Koji Koyamada
In Proc. of IEEE Pacific Visualization 2015 (Poster)      Apr 2015   [Refereed]
Network Coarse-Graining for Evaluation Structures
Yosuke Onoue, Nobuyuki Kukimoto, Naohisa Sakamoto and Koji Koyamada
In Proc. of International Conference on Simulation Technology (JSST2015)   447-450   Oct 2015   [Refereed]
Remote visualization system based on particle based volume rendering
Takuma Kawamura, Yasuhiro Idomura, Hiroko N. Miyamura, Hiroshi Takemiya, Naohisa Sakamoto, Koji Koyamada
In Proc. of Conference on Visualization and Data Analysis 2015 (VDA2015)      Feb 2015   [Refereed]
Word Cloud Visualization of Evaluation Structures focusd on Location
Keita Ozawa, Naohisa Sakamoto and Koji Koyamada
In Proc. of International Conference on Simulation Technology (JSST2015)   451-454   Oct 2015   [Refereed]
Takuma Kawamura, Yasuhiro Idomura, Hiroko Miyamura, Hiroshi Takemiya, Naohisa Sakamoto, Koji Koyamada
Proceedings of SPIE - The International Society for Optical Engineering   9397    Jan 2015
© 2015 SPIE-IS & T. In this paper, we propose a novel remote visualization system based on particle-based volume rendering (PBVR),1which enables interactive analyses of extreme scale volume data located on remote computing systems. The re- mote PB...
Satoshi Nakada, Satoshi Nakada, Katsuhisa Baba, Masatoshi Sato, Masafumi Natsuike, Yoichi Ishikawa, Toshiyuki Awaji, Koji Koyamada, Sei Ichi Saitoh
Progress in Earth and Planetary Science   1    Dec 2014
© 2014, Nakada et al.; licensee Springer. This study investigated the role of snowmelt runoff on water circulation, water mass formation, and the production of cultured scallop larvae, as a part of a land-sea linkage, by analyzing hydrological dat...
Hideo Miyachi, Tomoyuki Ishida, Naohisa Sakamoto, Koji Koyamada
Artificial Life and Robotics   19 286-290   Nov 2014
© 2014, ISAROB. The speed up of supercomputers has increased the complexity of simulations. To analyze such kind of data, new types of visualization software are needed. As one of approach for meeting this requirement, we are developing the “Fusio...
Fused Visualization for Large-scale Time-varying Volume Data with Adaptive Particle-based Rendering
Kun Zhao, Naohisa Sakamoto, Koji Koyamada
In Proc. of International Conference on Systems Simulation (AsiaSim2014), pp. 228-242      Oct 2014   [Refereed]
Visualization of Large-scale Time-varying Unstructured Volume Data with Interactive Particle-based Rendering
Kun Zhao, Naohisa Sakamoto and Koji Koyamada
In Proc. of International Conference on Simulation Technology (JSST2015)   12-15   May 2015   [Refereed]
Fused Visualization for Large-scale Blood Flow Dataset
Kun Zhao, Naohisa Sakamoto, Koji Koyamada
The 2014 International Conference on Life System Modeling and Simulation (LSMS2014) and 2014 International Conference on Intelligent Computing for Sustainable Energy and Environment (ICSEE2014), pp. 246-255      Sep 2014   [Refereed]
A Path-line-based Approach for Developing a Fishing Ground Model
Koji Koyamada, Katsumi Konishi, Naohisa Sakamoto and Marohito Takami
In Proc. of International Conference on Systems Simulation (AsiaSim2015)      May 2015   [Refereed]
Kun Zhao, Naohisa Sakamoto, Koji Koyamada
China Visual Analytics 2014      Jul 2014   [Refereed]
Satoshi Tanaka, Makoto Uemura, Kyoko Hasegawa, Takehiko Kitagawa, Takahiro Yoshida, Asuka Sugiyama, Hiromi T. Tanaka, Atsushi Okamoto, Naohisa Sakamoto, Koji Koyamada
In Proc. of IEEE Pacific Visualization 2014 (Visualization Notes), (accepted)   267-271   Jan 2014
We propose a new application of stochastic point-based rendering, which was recently proposed for implicit surfaces, to large-scale laser-scanned 3D point data. Specifically, we propose a scheme to apply the rendering to transparent and fused visu...
Ensemble-Averaged Visualization for the Interannual Variability of Water Mass Dynamics for the Northwestern Pacific Near Japan
Kun Zhao, Satoshi Nakada, Naohisa Sakamoto, Koji Koyamada
In Proc. of The 16th International Symposium on Flow Visualization (ISFV16)      Jun 2014   [Refereed]
Koji Koyamada, Xiaoru Yuan
Journal of Visualization   17 143-144   Jan 2014
Kun Zhao, Naohisa Sakamoto, Koji Koyamada
Communications in Computer and Information Science   461 246-255   Jan 2014
© Springer-Verlag Berlin Heidelberg 2014. Recently, there is a big need for the fused visualization in medical simulation field (e.g., the large-scale blood flow dataset). That is because it is desirable and advantageous to fuse the different obje...
Koji Koyamada
IEEE Pacific Visualization Symposium      Jan 2014
Koji Koyamada, Nobuyuki Kukimoto
IEEE Pacific Visualization Symposium   346-347   Jan 2014
In this talk, we will clarify roles of visualization techniques which are mandatory to employ a scientific method in policy-making. Currently, many countries are investing heavily in policy-making process development through the ICT for this purpo...
Naohisa Sakamoto, Koji Koyamada
In Proc. of IEEE Pacific Visualization 2014 (Visualization Notes), (accepted)   272-276   Jan 2014
In this paper, we propose a technique for rendering multiple irregular volumes using a stochastic approach. In this approach, we extend our stochastic projected tetrahedral (SPT) algorithm to treat irregular volumes. The SPT algorithm is a sorting...
Kun Zhao, Naohisa Sakamoto, Koji Koyamada
Communications in Computer and Information Science   474 228-242   Jan 2014
© Springer-Verlag Berlin Heidelberg 2014. Recently, there is a strong need for the fused visualization of different objects in many simulation fields, especially for the medical domain (e.g., the fusion of different organs). That is because it is ...
Uenaka Takashi, Naohisa Sakamoto, Koji Koyamada
In Proc. of IEEE Pacific Visualization 2014 (Visualization Notes), (accepted)   306-310   Jan 2014
In this study, we propose a novel integrated visualization system that enables interactive visual development of a Habitat Suitability Index (HSI) model for predicting the locations of fishing grounds. Our system enables the interactive selection ...
Daichi Hara, Naohisa Sakamoto, Koji Koyamada, Hideo Miyachi, Kazuyasu Sugiyama
In Proc. of IEEE Pacific Visualization 2014 (Poster)      Mar 2014   [Refereed]
Visual Analytic System for Habitat Suitable Index Modeling of Neon Flying Squid with Visualization Tequnique
Masashi Kushida, Takashi Uenaka, Naohisa Sakamoto, Koji Koyamada
In Proc. of IEEE Pacific Visualization 2014 (Poster)      Mar 2014   [Refereed]
Kun Zhao, Satoshi Nakada, Naohisa Sakamoto, Koji Koyamada, Yoichi Ishikawa, Toshiyuki Awaji, Teiji In, Sei-Ichi Saitoh
可視化情報学会、第41回可視化情報シンポジウム講演論文集   4    Jan 2013
Recent studies are focusing on the distribution of water mass because the mixture region of water mass is highly related to the rich fishing grounds [Yasuda I., Watanabe Y., Fish. Oceanogr. 3(3):172-181, 1994]. Due to the large data size and time-...
Visualizing Cognitive Structures Using a Layered Graph Drawing
Yosuke Onoue, Nobuyuki Kukimoto, Miki Kioka, Koji Koyamada
In Proc. of IEEE Pacific Visualization 2014 (Poster)      Mar 2014   [Refereed]
Ensemble-Averaged Visualization of the Water Mass Distribution for the Northwestern Pacific Ocean near Japan
Kun Zhao, Satoshi Nakada, Naohisa Sakamoto, Koji Koyamada
In Proc. of IEEE Pacific Visualization 2014 (Poster)      Mar 2014   [Refereed]
Kun Zhao, Naohisa Sakamoto, Koji Koyamada
In Proc. of International Conference on Systems Simulation (AsiaSim2013)   402 136-148   Jan 2013
Data compression is always needed in large-scale time-varying volume visualization. In some recent application cases, the compression method is also required to provide a low-cost decompression process. In the present paper, we propose a compressi...
Ancel A.,?Assenmacher I., Baba K., Cisonni J., Fujiso Y., Goncalves P., Imbert M., Koyamada K., Neyron P., Nozaki K., Ohsaki H., Orgerie A.C., Pelorson X., Raffin B., Sakamoto N., Sakane E., Shimojo S., Van Hirtum A., Wada S.
Computer Software and Applications Conference Workshops (COMPSACW), 2013 IEEE 37th Annual   703-708   Oct 2013
The Petaflow project aims to contribute to the use of high performance computational resources to the benefit of society. To this goal the emergence of adequate information and communication technologies with respect to high performance computing-...
SAKAMOTO Naohisa;KUKIMOTO Nobuyuki;YASUHARA Yukio;EBARA Yasuo;KOYAMADA Koji
Int Symp Adv Fluid Inf   17(1) ROMBUNNO.F-2-7-164   May 2012   [Refereed]
For the thermal management of the electric products, the compact modeling method is commonly applied to the numerical analysis with the simplification of the each component used in the products, on the view point of the best thermal design. In the...
Nobuyuki Kukimoto, Yosuke Onoue, Kazuo Aoki, Kinya Fujita, Koji Koyamada
Proceedings - 2014 International Conference on Network-Based Information Systems, NBiS 2014   399-404   Jan 2014
© 2014 IEEE. In an office or laboratory, the informal communication that suddenly occurs in a face-to-face meeting sometimes takes the form of a heated discussion or important information sharing. Visual information, such as pictures and graphs, f...
Hideo Miyachi, Naohisa Sakamoto, Koji Koyamada
Proceedings - 2014 International Conference on Network-Based Information Systems, NBiS 2014   416-419   Jan 2014
© 2014 IEEE. We have been developing a new type of visualization software called 'Fusion Visualization'. It allows users to fuse latest volume to legacy surface rendering. This ombination makes users enable to select the best rendering technique a...
Ocean Prediction for Aquaculture: An Interview-based system
Satoshi Nakada, Yoichi Ishikawa, Koji Koyamada, Toshiyuki Awaji, and Sei-Ichi Saitoh
In Proc. of International Conference on Simulation Technology (JSST2013)      Sep 2013   [Refereed]
Time-varying Volume Compression in Spatio-temporal Domain
Kun Zhao, Naohisa Sakamoto, and Koji Koyamada
In Proc. of International Conference on Simulation Technology (JSST2013)      Sep 2013   [Refereed]
Exploration of relationship between fishery and vortices
Takashi Uenaka, Naohisa Sakamoto, Koji Koyamada
In Proc. of International Conference on Simulation Technology (JSST2013)      Sep 2013   [Refereed]
GPU Accelerated Particle Generation for Particle-Based Surface Rendering
Hideo Miyachi, Kayoko Katsuyama, Satoshi Tanaka, Kyoko Hasegawa, Koji Koyamada, Naohisa Sakamoto
In Proc. of International Conference on Simulation Technology (JSST2013)      Sep 2013   [Refereed]
N. Sakamoto; K. Koyamada
Proceedings - 2012 SC Companion: High Performance Computing, Networking Storage and Analysis, SCC 2012   176-185   Dec 2012
In this paper, we propose a technique for semi-transparent rendering, which can integrally handle irregular volumes and polygons without visibility sorting. A projection technique for rendering of the irregular volumes requires a large memory spac...
DOI Akio, KOYAMADA Koji, MIYACHI Hideo
可視化情報学会誌 = Journal of the Visualization Society of Japan   33(129)    Apr 2013
Fusion visualization of surface and volume on AVS/Express
Hideo Miyachi,Naohisa Sakamoto,Koji Koyamada
In Proceedings of International Symposium on Artificial Life and Robotics (AROB 2013)      2013   [Refereed]
DOI Akio, KOYAMADA Koji, YOKONO Yasuyuki
可視化情報学会誌 = Journal of the Visualization Society of Japan   32(125)    Apr 2012
Chi Zhang, Naohisa Sakamoto, Koji Koyamada
In Proceedings of Asia Simulation Conference (ASC2012).      2012   [Refereed]
Visualization and Analysis of Currents and Temperature Distribution Based on Ocean Data
Zhang. C,Uenaka. T,Sakamoto.N,Koyamada.K.
In Proceedings of International Conference on Simulation Technology (JSST2012), USB-Memory      2012   [Refereed]
Stochastic Approach for Integrated Rendering of Volumes and Semi-transparent Surfaces
Sakamoto.N,Koyamada.K
In Proceedings of the 2012 Workshop on Ultrascale Visualization (Ultravis 2012)      2012   [Refereed]
Particle-Based Transparent Rendering of Implicit Surfaces and its Application to Fused Visualization
Satoshi Tanaka, Kyoko Hasegawa, Yoshiyuki Shimokubo, Tomonori Kaneko,Takuma Kawamura, Susumu Nakata, Saori Ojima,Naohisa Sakamoto, Hiromi T. Tanaka, and Koji Koyamada
In Proceedings of EuroVis 2012, Vienna (Austria), pp.25-29      2012   [Refereed]
Block Division with Fast Cubic B-spline Reconstruction
Zhao.K,Sakamoto. N,Koyamada. K
In Proceedings of International Conference on Simulation Technology (JSST2012), USB-Memory      2012   [Refereed]
A Visualization Study of Vortexes Extracted from the Tremendous Ocean Simulation Data: An Application in Funka Bay
Nakada. S, Ishikawa. Y,Uenaka, T,Sakamoto. N,Koyamada. K, Awaji. T, Saitoh. S.
In Proceedings of International Conference on Simulation Technology (JSST2012), USB-Memory      2012   [Refereed]
A. Lorant; A. Ancel; K. Zhao; N. Sakamoto; K. Koyamada; B. Raffin
Communications in Computer and Information Science   323 CCIS(PART 1) 285-296   2012   [Refereed]
C. Zhang; T. Uenaka; N. Sakamoto; K. Koyamada
Communications in Computer and Information Science   327 CCIS(PART 2) 114-123   2012   [Refereed]
C. Zhang; N. Sakamoto; K. Koyamada
Communications in Computer and Information Science   323 CCIS(PART 1) 175-181   2012   [Refereed]
K. Zhao; N. Sakamoto; K. Koyamada
Communications in Computer and Information Science   325 CCIS(PART 3) 373-387   2012   [Refereed]
K. Zhao; N. Sakamoto; K. Koyamada
Communications in Computer and Information Science   323 CCIS(PART 1) 163-174   2012   [Refereed]
An Effectiveness Verification Method for Visualizing a Disaster Simulation
Koji KOYAMADA
Pfoceedings of International Symposium on Disaster Simulation & Structural Safety in the Next Generation(DS'11)?      Sep 2011   [Refereed]
KOYAMADA Koji
シミュレーション   30(1)    Apr 2011
H. Ohsaki; K. Nozaki; K. Baba; E. Sakane; N. Sakamoto; K. Koyamada; S. Shimojo
Proceedings - 11th IEEE/IPSJ International Symposium on Applications and the Internet, SAINT 2011   256-259   Sep 2011
This paper discusses vision and challenges toward realization of peta-flow computing, which enables peta-scale information processing and communication. A promising application for peta-flow computing, a large-scale upper airway flow simulation an...
TANAKA Satoshi, KOYAMADA Koji
Journal of the Japan Society for Simulation Technology   30(1) 51-53   Apr 2011
YOKONO Yasuyuki, KOYAMADA Koji
可視化情報学会誌 = Journal of the Visualization Society of Japan   31(121)    Apr 2011
西村 純, 坂本 尚久, 小山田 耕二
可視化情報学会誌   31(1) 295-298   2011
Visualization of Plasma Plume Collisions Using Fused Volume Data
N.Kawamoto, Y.Hatanaka, T.Yamamoto , K.Hasegawa, S.Nakata, S.Tanaka, N.Sakamoto, K.Koyamada, S.Misaki, and K.Tanaka
Proceedings of the Asia Simulation Conference 2011(AsiaSim2011)      2011   [Refereed]
Tiled Display Visualization System with Multi-touch Control
J.Nishimura, N.Sakamoto, and K.Koyamada
Proceedings of the Asia Simulation Conference 2011(AsiaSim2011)      2011   [Refereed]
H. Miyachi; H. Shigeta; K. Kiyokawa; H. Kuwano; N. Sakamoto; K. Koyamada
Proceedings - 13th International Conference on Network-Based Information Systems, NBiS 2010   435-438   Dec 2010
In this paper we present a parallelized particle-based volume rendering (PBVR) system to obtain super linear speedup, i.e. the speedup with N processors is greater than N, on a distributed computing system. PBVR is a technique of volume rendering ...
Static Visualization of Dynamical Plasma Collision
N.Kawamoto, Y.Hatanaka, K.Hasegawa, S.Nakata, S.Tanaka, N.Sakamoto, K.Koyamada, M.Osada, and K.Tanaka
Proceedings of the 11th Asian Symposium on Visualization (ASV11)      2011   [Refereed]
細胞死に伴う小胞形成の時系列的変動の解析
酒巻 和弘, 坂本 尚久, 河村 拓馬, 千場 久美子, 澤崎 達也, 小山田 耕二
日本生化学会大会・日本分子生物学会年会合同大会講演要旨集   83回・33回 2P-0245   Dec 2010
P. Gonçalves; X. Grandchampy; X. Pelorsony; B. Raffinz; A. Van Hirtumy; P. Vicat-Blanc; K.-I. Baba; J. Cisonni; Y. Ebara; K. Nozaki; H. Ohsaki; S. Wada; T. Kawamura; K. Koyamada; E. Sakanez; N. Sakamoto; S. Shimojoy
Proceedings - 2010 10th Annual International Symposium on Applications and the Internet, SAINT 2010   347-350   Nov 2010
The Petaflow project aims to contribute to the use of high performance computational resources to the benefit of society. To this goal the emergence of adequate information and communication technologies with respect to high performance computing-...
Multi-dimensional Binning for Parallel Coordinates and Application to Large-scale CFD Results
N.Sakamoto, T.Tanaka, and K.Koyamad
Proceedings of the 11th Asian Symposium on Visualization (ASV11)      2011   [Refereed]
Large-scale Data Exploration with Clustered Parallel Coordinates
C.Zhang, N.Sakamoto, and K.Koyamada
International Conference on Modeling and Simulation Technology (30th JSST Annual Conference -JSST2011- )      2011   [Refereed]
Development of Multi-touch User Interface for Tiled Display Visualization System
J.Nishimura, N.Sakamoto, and K.Koyamada
International Conference on Modeling and Simulation Technology (30th JSST Annual Conference -JSST2011- )      2011   [Refereed]
Clustered Parallel Coordinates with High-Speed k-Means Algorithm and Out-of-Core Feature
C.Zhang, N.Sakamoto, and K.Koyamada
Proceedings of the Asia Simulation Conference 2011(AsiaSim2011)      2011   [Refereed]
A New Framework for Visualizing a Time-varying Unstructured Grid Dataset with PBVR
K.Zhao, J.Nishimura, N.Sakamoto, and K.Koyamada
Proceedings of the Asia Simulation Conference 2011(AsiaSim2011)      2011   [Refereed]
KOYAMADA Koji
シミュレーション   29(3)    Oct 2010
Ding Zhongming, Takuma Kawamura, Naohisa Sakamoto, Koji Koyamada
Simulation Modelling Practice and Theory   18 1172-1183   Sep 2010
In this paper, we describe an improved particle-based volume rendering (PBVR) technique for previewing a large irregular volume dataset using the CUDA architecture. This technique allows for opaque and emissive particles to render translucent volu...
Naohisa Sakamoto, Hiroshi Kuwano, Takuma Kawamura, Koji Koyamada, Kazunori Nozaki
International Journal of Emerging Multidisciplinary Fluid Sciences   2 73-86   Jun 2010
In this paper, we present a technique for visualizing a large-scale irregular volume dataset that is generated from an LES-based CFD simulation. Since our computational mesh was too large for a single computational node, it was divided into multip...
KOYAMADA Koji
シミュレーション   29(1)    Mar 2010
Satoshi Tanaka, Kyoko Hasegawa, Susumu Nakata, Hideo Nakajima, Takuya Hatta, Frederika Rambu Ngana, Takuma Kawamura, Naohisa Sakamoto, Koji Koyamada
International Journal of Modeling, Simulation, and Scientific Computing   1 199-218   Jan 2010
We propose a method of sampling regular and irregular-grid volume data for visualization. The method is based on the Metropolis algorithm that is a type of Monte Carlo technique. Our method enables "importance sampling" of local regions of interes...
Integration of Semi-transparent Polygons for Sorting-free Volume Rendering
Naohisa Sakamoto, Takuma Kawamura, Koji Koyamada
Poster Proceedings of IEEE Pacific Visualization Symposium 2010, pp.5-6      2010   [Refereed]
Yasuo Ebara, Ken Ichi Sakurai, Hideaki Sone, Naohisa Sakamoto, Koji Koyamada
Journal of the Institute of Image Electronics Engineers of Japan   38 753-761   Jan 2009
The demand for the remote visualization has rising in order to construct remote collaborative work environment for working common issues by sharing visualization results of large-scale volmue data between remote places at real time, although the e...
Takuma Kawamura, Naohisa Sakamoto, Koji Koyamada
Asia Simulation Conference 20099, CD-ROM      Jan 2009
In this paper, we propose a streamline visualization techniques for a large-scale CFD result that is divided into multiple sub-volumes. In the proposed technique, we construct a new data structure for representing an adjacency between the sub-volu...
An Exploration of Multivariate Time-Varying Volume Datasets Using Volumetric Parallel Coordinates
Shiori Yasuoka, Naohisa Sakamoto, Koji Koyamada
Proceedings of the 7th EUROSIM Congress on Modelling and Simulation, CD-ROM, 2010      2010   [Refereed]
A High-Quality Sampling Technique of PBVR for Unstructured Hexahedral Mesh Data,
Takuma Kawamura, Koji Koyamada, Naohisa Sakamoto, Satoshi Tanaka,
IEEE Visualization'10 (Poster),      2010   [Refereed]
Takuma Kawamura, Koji Koyamada, Naohisa Sakamoto
Proc. of 2009 Workshop on Visualization Applications   25 905-915   Sep 2010
This paper describes a level-of-detail rendering technique for large-scale irregular volume datasets. It is well known that the memory bandwidth consumed by visibility sorting becomes the limiting factor when carrying out volume rendering of such ...
N. Sakamoto; T. Kawamura; H. Kuwano; K. Koyamada
Proceedings of the 2009 Workshop on Ultrascale Visualization, UltraVis \\'09   11-18   Dec 2009
In this paper, we present a sorting-free technique for volume rendering of an irregular volume dataset. Although the importance of our particle-based volume rendering is widely recognized, its low image quality has been pointed out. Especially whe...
MIYACHI Hideo, KIYOKAWA Kiyoshi, EBARA Yasuo, KOYAMADA Koji
IEICE technical report   109(208) 13-16   Sep 2009
High Definition display devices like 4k projector can show fine images, but, even those do not have enough resolution to visualize large data simulation to be produced by the Next-Generation Supercomputer. As it is too difficult to move such large...
T. Tanaka; A. Yamasaki; K. Koyamada; N. Sakamoto
Digest of Technical Papers - IEEE International Conference on Consumer Electronics   718-722   Oct 2009
In this paper, we apply our interactive hierarchical response surface methodology to parameter optimization of photonic crystal nanocavities. Although high quality factor (Q) photonic crystal nanocavities have been proposed, it needs the higher va...
SAKAMOTO Naohisa, KOYAMADA Koji
Journal of the Japan Society for Computational Engineering and Science   14(3) 2130-2137   Jul 2009
SAKAMOTO Naohisa, KOYAMADA Koji
Journal of the Japan Society for Computational Engineering and Science   14(2) 2062-2069   Apr 2009

Conference Activities & Talks

 
Particle modeling for fluid simulation and visualization [Invited]
KOYAMADA Koji
Future Mind-International Symposium   23 Nov 2017   
Scientific Visualization in open data era [Invited]
KOYAMADA Koji
The 12th annual Scientific and Technological Conference   18 Nov 2017   
Visual Causality Exploration and its Applications [Invited]
KOYAMADA Koji
JSST2017   25 Oct 2017   
Visual Causality Exploration and its Applications [Invited]
KOYAMADA Koji
The 1-st China-Japan Joint Visualization Workshop   16 Sep 2017   
Data-driven?analysis of the mechanism of animal development [Invited]
KOYAMADA Koji
Big Data Application Symposium   16 Sep 2017   

Research Grants & Projects

 
Development of an environmental Simulation Server
Web-based Visualization Technologies
Optimization technologies for developing mobile products
Contract Research
Project Year: 2002 - 2006