This paper describes the aortic valve's opening and closing simulation, which has been performed by using a particle method. The blood in the aorta flows according to the pressure difference between the heart and the aorta, and this blood flow makes the aortic valve open and close. If the aortic valve malfunctions, some surgeries are needed to be operated, and computer simulation of the aortic valve's movement is necessary. In the simulation, there are two different types of materials: elastic body that is the aortic valve, and fluid that is blood. The topology of the blood flow changes due to the opening and closing of the aortic valve. Then, the mesh of the simulation models is needed to be reconstructed all the time if FEM (Finite Element Method) is adopted. Then, we have used particle method rather than FEM for the simulation. In addition, two different types of constitutive equations have been used to represent the two different types of materials: elastic body and fluid. As the result of the simulations, we have found that the movement of the aortic valve is different according to the length of the aortic valve's leaflet.

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In medical interviews, Japanese patients often use onomatopoeia such as "zuki-zuki" and "gan-gan" to express their pains or medical conditions. Using onomatopoeia when expressing pain enables simpler and more direct expressions than normal language as well as expresses the quantity (level/intensity) and quality (location/depth) of the pain. However, the subtle differences in characteristics of pain (such as quality), for example between "zeh-zeh" and "zero-zero", are difficult to grasp accurately. Although grasping these differences accurately is said to be critical, it depend on the level of skill of a doctor. So in this study, we constructed a system which supports communication between patients and doctors by evaluating meanings expressed by onomatopoeia. When a user inputs Japanese onomatopoeia, our system estimates quantities and qualities of pains using the relationships between the sounds used in the onomatopoeia and meanings expressed by 35 rating scales such as "sharp - dull", "strong - weak", and "deep - shallow". Visualizing of pains will help to compare between conventional onomatopoeic words such as "zeh-zeh" and novel words such as "zero-zero".

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We propose an interactive healthcare system that uses feces data to support health promotion using smart phone. User inputs feces data, such as shape, color, smell, etc., into the system when they go to the lavatory. If the input data is significantly bad, the user will be notified that the condition of his/her health requires more attention. The user can print feces data that is stored in the system and show it to a doctor. We expect the users can adhere to input their data to the system without getting bored by introducing an interactive game interface.

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We propose mono-glass for assisting patients who lost sight in one eye to perceive depth information. The loss of sight in one eye disables patients to do binocular disparity processing. It makes short-range activities difficult. Our proposed mono-glass is a wearable device with one display monitor presenting images to the healthy eye and two cameras facing outward. The two cameras capture the stereo images required for reconstructing depth information on behalf of patient's eyes. Reconstructed depth is represented as blur for the healthy eye. Experimental results demonstrated that our system could enhance the depth perception from single-channel images.

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We propose a novel training method for laparoscopy using view-sharing technology where the expert's skillful movements are superimposed on the learner's view. When learning the skill, the learner just traces the expert's movement as if they feel the skillful movements as their own. Our proposed method was evaluated in terms of time required for the task and the number of errors. The training effect was also tested with the doctors in training and the acquired skills were evaluated by the expert surgeon.

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Haptic interaction with FEM-based deformable model is popular by using pre-calculated inversed stiffness matrix. However, large deformation induces non-ignorable error with linear FEM simulation. Recently, corotation method was introduced to reduce the artifact by calculating elastic forces in the rotation-canceled coordinates. However, inversion of updated whole stiffness matrix is computationally high. The aim of this study is to enable haptic interaction of FEM-based deformable model with reduced artifact in case of large deformation. In this paper, we proposed the direct and stepwise update method of inversed stiffness matrix with corotated element stiffness matrix. The experimental results showed smaller error compared with linear model and higher update rate by using the proposed method.

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In this paper, we describe a CNC(Computer Numerical control)-cutting based material bending method called "Dukta" and propose a novel computational system for fabricating curved surface with Dukta from conventional materials without using molds. Fabricating curved objects is laborious. Previous methods necessitated a mold to produce a certain curved objects and were applicable only for mass production. We create a system for manufacturing curved objects without any mold. To achieve this, we use "Dukta" and developed a computational framework for designing curved shape and generating a fabrication plan. Our objective is to fabricate various customized curved shape only by user's shape modeling, CNC-cutting and user assembly. Our method is not for mass production but for customized and site-adaptive production.

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Due to the wide spread of smart phones and PCs, people can access information everywhere in everyday life. However are very few methods in accessing contents in a bathing environment. Some people carry smart phones into a bathroom but it is unnatural to be holding a device at during bathing. This paper propose an interactive water surface display system, in which the images are projected on the surface of water with bath salt and users can interact with information on the water by using gestures. In this paper, we discuss interaction design in a bathroom, describing an implementation of our system and its applications.

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Aiming at improving the usability of projection-based mixed reality user interface by providing users with haptic feedback, we propose a visuo-thermal projection by which visible and far-infrared lights are projected onto real world objects such as our bodies. We implemented a prototype system by realizing far-infrared projector. Two experiments were conducted to confirm the cross modal effects between visual and thermal sensations. The results of the experiments showed that visual stimuli could potentially affect the thermal sensation both temporally and spatially.

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