Computer Graphics Laboratory

Gennadiy Nikishkov Professor	Roman Durikovic Assistant Professor

Members of the Computer Graphics Laboratory perform research in physics-based modeling of different phenomena, their visualization and animation. New approaches to modeling, rendering, simulation and scientific visualization are under development. Created mathematical models are used for graphical representation of natural processes. Current research areas include: Visualization of surface and volume data, which results from finite element, boundary element and finite difference modeling. Development ofaugmented reality interface suitable for use in medical physics measurements. Nanomechanics modeling. Numerical approach is used for modeling of micro- and nanostructures with large translations and rotations. Quadtree/octree finite element technique for surface on surface or function in volume approximation. Physics-based animation of liquids and bubbles. Hardware based rendering. Modification of rendering equation to simulate different effects on GPU in real-time. Rendering the real paints. Construction of BRDF from paint composition and rendering using GPU. Examples include Japanese lacquer ware. Professors of the Computer Graphics Laboratory deliver courses in Computer Graphics, Introduction to Topology, Language Processing, Numerical Analysis, Modeling and Visualization. Graduation projects and SCCP are related to computer modeling, visualization and animation and to Web technologies.

Refereed Journal Papers

[niki-01:2004]	G. P. Nikishkov and T. Tsuchimoto. Web-based teacher-student interaction in a traditional course. WSEAS Transactions on Advances in Engineering Education, 1:15-20, 2004.
	Platform independent Java application to support interaction between an instructor, teaching assistants and students in a traditional on-campus course is developed. The TSI (teacher-student interaction) application includes specialized Web server, ordinary Web server, simple database and mailer. The HTTP protocol is used for all communications. Students have possibilities to check their personal data (scores and comments), to download educational materials, to upload files and to communicate to the instructor or teaching assistants. The instructor and teaching assistants can upload Excel table containing student personal information, send personal emails to students, upload educational materials etc.
[niki-02:2004]	G. P. Nikishkov. Finite element algorithm with adaptive quadtreeoctree mesh refinement. ANZIAM Journal, 46:C15-C28, 2005.
	Special refinement elements are presented that make possible connecting two special elements to one edge of an 8-node quadrilateral element (2D). The main idea in refinement elements is to place some midside nodes outside the element area and to modify element shape functions in order to maintain continuity at a refinement edge. Special refinement elements allow to adaptively refine mesh in such away that it fits the quadtree data structure. In the three-dimensional case, hexahedral elements with 20 nodes are employed. Placement of some nodes outside the element volume allows to create a compatible octree refinement scheme.

Referred Proceeding Papers

[niki-03:2004]	T. Tsuchimoto, Y. Nishidate, N. N. Mirenkov, and G. P. Nikishkov. Augmented reality interface for measurement of tissue stiffness. In Proceedings of the Fifth Int. Conference on Human and Computer HC 2004, pages 148-153, Aizu-Wakamatsu, 1-3 Sep. 2004.
	An implementation of an augmented reality interface for measurring tissue stiffness using the tactile sensor is presented. A developed augmented reality system provides real-time visualization of tissue stiffness measurements. A head-mounted display with a small video camera and a notebook computer are employed. Tracking of real-world objects is performed with a marker attached to a patient's body. Results of stiffness measurements are depicted as semi-transparent three-dimensional objects projected on the patient's body. Experiments show that the system behaves satisfactory and provides reasonable frame rates and picture delays.
[niki-04:2004]	G. P. Nikishkov, T. Tsuchimoto, and N. N. Mirenkov. Web-based teacher-student interaction in a traditional course. In Ed. C. Manikopoulos et al, editor, Proceedings of the WSEAS Int. Conf. on Engineering Education EE 2004, page 6 pp., Venice, 15-17 Nov. 2003.
	Java application for supporting interaction between a professor, teaching assistants and students in an on-campus course has been developed. The TSI application consists of ordinary Web server, specialized Web server, database and mailer. All communications are performed with the use of Web brouser. Students have possibilities to check their personal data, to download educational materials, to upload files and to communicate to the instructor or teaching assistants. The professor and teaching assistants can upload Excel table containing student personal information, send personal emails to students, upload educational materials etc.

Academic Activities

[niki-05:2004]	Gennadiy Nikishkov, 2004. Member of the Editorial Board, International Journal 'Computer Modeling in Engineering and Sciences'.
[niki-06:2004]	Gennadiy Nikishkov, Sept. 2004. Member of the Editorial Board, Int. Conference on Computational Structures Technology.
[niki-07:2004]	Gennadiy Nikishkov, 2004. Reviewer, Computer Modeling in Engineering and Sciences.
[niki-08:2004]	Gennadiy Nikishkov, 2004. Reviewer, Nanotechnology.
[niki-09:2004]	Gennadiy Nikishkov, 2004. Reviewer, Journal of Applied Physics.
[niki-10:2004]	Gennadiy Nikishkov, 2004. Reviewer, Advances in Engineering Software.

Ph.D. and Other Theses

[niki-11:2004]	Tomokazu Tsuchimoto. Graduation Thesis: Augmented reality interface for measuring tissue stiffness, University of Aizu, 2004. Thesis Advisor: Gennadiy Nikishkov
[niki-12:2004]	Hiroaki Morishima. Graduation Thesis: Visualization of volume data in FEM, University of Aizu, 2004. Thesis Advisor: Gennadiy Nikishkov
[niki-13:2004]	Kumiko Murakami. Graduation Thesis: Algorithms for quadtree data structures, University of Aizu, 2004. Thesis Advisor: Gennadiy Nikishkov
[niki-14:2004]	Toshiya Sakai. Graduation Thesis: Use of image based modeling for creating architectural objects, University of Aizu, 2004. Thesis Advisor: Gennadiy Nikishkov
[niki-15:2004]	Yusuke Sakuma. Graduation Thesis: Generation of 3D Finite Element Mesh, University of Aizu, 2004. Thesis Advisor: Gennadiy Nikishkov

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