Tatsuya Mori

Precise Control of the Drug Kinetics by Non-Invasive Magnetic Drug Delivery System

To solve the problems of side effects and medicinal lowering, studies on the magnetic drug delivery system (MDDS) have been applied. MDDS is a technique to accumulate drugs by using magnetic force as the physical driving force. It is necessary to apply a strong external magnetic field and high magnetic gradient to accumulate the ferromagnetic drugs to a deep diseased part noninvasively. However, by applying a static magnetic field from one direction, the drug accumulates only at the body surface near the magnet. In this study, we proposed a new method of MDDS in which a high-temperature superconducting (HTS) bulk magnet rotates around a target part. First, the particle trajectory simulation was conducted to examine the drug kinetics in a capillary blood vessel under the condition of rotating a magnet. Based on the results, the accumulation experiments of ferromagnetic particles with model blood vessels were conducted. As a result, the accumulation possibility of the ferromagnetic particles in the deep targeted part of the body was confirmed.

Separation of Flame and Nonflame-retardant Plastics Utilizing Magneto-Archimedes Method

In physical recycling process, the quality of recycled plastics becomes usually poor in case various kinds of plastic materials are mixed. In order to solve the problem, we tried to separate flame and nonflame-retardant plastics used for toner cartridges as one example of mixed plastics by using magneto-Archimedes method. By using this method, we can control levitation and settlement of the particles in the medium by controlling the density and magnetic susceptibility of the medium and the magnetic field. In this study, we introduced the separation system of plastics by the combination of wet type specific gravity separation and magneto-Archimedes separation. In addition, we examined continuous and massive separation by introducing the system which can separate the plastics continuously in the flowing fluid.

FUNDAMENTAL STUDY FOR CONTROL OF ENVIRONMENT LIGHT USING BIOLOGICAL SIGNAL

The objective of this study is to presume the human psychological condition with the biological signal in order to feedback the result to the person and to control the living environment automatically depending on the result. In this paper, the influence of living environment on the human body was examined as a fundamental study. The elements of living environment which compose the living environment includes sound, temperature, humidity and light, etc. Among them, the influence of environment light on biological response was evaluated. Biological reactions stimulated by red, green and blue light were analyzed using an ECG (electrocardiogram), EEG (electroencephalogram) and MEG (magnetoencephalogram). As a result, a significant difference was observed between green and red light in LF/HF obtained from ECG, in percentage of alpha wave rate obtained from EEG and in latent time of P300 and amplitude of P300 obtained from MEG. In addition, the possibility was suggested that green light induces a rest state whereas red light induces a concentrated state. Based on the results, automated control system of environment light by biological signal was constructed.

Integrated Method for Loss-Resilient Multicast Source Authentication and Data Reconstruction

Multicast is efficient transfer scheme for contents distribution to a large number of clients, but it is necessary to meet security issues. On the other hand, source authentication is one of the important techniques for protecting from malicious users that plot eavesdropping, masquerading and so on. Though many authentication schemes have been proposed, most of them are not suitable for practical multicast network. The design of scheme should meet robustness against unreliable network. In this paper, we expand the existent authentication scheme using erasure code, and propose the novel control mechanism that cooperates with data reconstruction process. In addition, we show the effectiveness of our proposal by computer simulation.