Yuji Sakamoto

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  • Fernando Miguel Pais, Graça Lobo, +39 authors Donna Eiskamp
  • 2000
Genetic algorithms (GAs) have been used to solve difficult optimization problems in a number of fields. One of the advantages of these algorithms is that they operate well even in domains where little is known, thus giving the GA the flavor of a general purpose problem solver. However, in order to solve a problem with the GA, the user usually has to specify(More)
Production of encapsulatable unit, scale-up of the production system, and encapsulation technologies were developed as an integrated technology for transplant production using somatic embryos of celery and carrot. Encapsulatable units, somatic embryos improved in their quality for encapsulation, showed 80% conversion without encapsulation and any nutrient(More)
A method to produce encapsulatable units for synthetic seeds was developed in Asparagus officinalis L. Encapsulatable units with high conversion ability in non-sterile soil were produced from somatic embryos by a pre-encapsulation culture. The synthetic seeds containing somatic embryos without the pre-encapsulation culture did not germinate in soil. When(More)
In recent years, an increased effort to design, build, and operate small satellites has taken place in universities and laboratories all over the world. These micro-satellites (or nano-satellites) provide numerous flight opportunities for science experiments at a fraction of the cost of larger traditional missions. In addition, there has been an increasing(More)
The effects of sugar concentration and strength of basal medium were studied to produce plants from somatic embryos in Asparagus of®cinalis L. There was a signi®cant difference among concentrations of sugar but not among kinds of sugar tested in the present experiment in growth of shoots and roots. When the sucrose concentrations were 10, 30, or 50 g lÿ1,(More)
Calculating computer-generated holograms takes a tremendous amount of computation time. We propose a fast method for calculating object lights for Fresnel holograms without the use of a Fourier transform. This method generates object lights of variously shaped patches from a basic object light for a fixed-shape patch by using three-dimensional affine(More)
Holography is an ideal 3D display technique, which shows us beautiful 3D images. It is hoped that 3D holo TV that is a 3D television system using holographic principle will be put to practical use. However, there are some difficulties to realize it. One of them is a capturing method under a natural light, because it required a laser light illumination in a(More)
Computer-generated holograms are generated by three-dimensional technology, and they can be used to reconstruct natural and virtual objects by simulating light waves based on holography. This research was an improvement on previous work that took into consideration reflectance distributions from the various roughnesses of objects. The previous work(More)
Computer-generated holograms (CGHs) using multiview images (MVIs) are holograms generated with multiple ordinary cameras. This process typically requires a huge number of cameras arranged at high density. In this paper, we propose a method to improve CGH using MVIs that obtains the MVIs by using voxel models rather than cameras. In the proposed method the(More)