Journal of Advanced Science

Plasma confinement in the GAMMA 10 tandem mirror

Kiyoshi YATSU, Teruji CHO, Hiroyuki HIGAKI, Mafumi HIRATA, Hitoshi HOJ ...

2002 Volume 14 Issue 4 Pages 139-142
Published: March 15, 2003
Released on J-STAGE: February 25, 2010

DOIhttps://doi.org/10.2978/jsas.14.139

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The plasma confinement in the GAMMA 10 tandem mirror is studied. The mirror confinement is much improved owing to the potential confinement. The high density plasma confinement was recently attained. Relations between confinement time and confining potential on the plasma density have been obtained in the high density region.

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Materials synthesis using microgravity circumstances

Takeshi OKUTANI

2002 Volume 14 Issue 4 Pages 143-150
Published: March 15, 2003
Released on J-STAGE: February 25, 2010

DOIhttps://doi.org/10.2978/jsas.14.143

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The advantages of working in a microgravity (μg) environment are the lack of gas or liquid mass transfer by convection, the clearly apparent surface tension of liquids, the homogeneous mixing of substances with different specific gravity, and ease of containerless processing. Spherical semiconductor single crystals such as InSb and Ge, nano-materials of SiGe and β-FeSi₂ and materials with controlled structure such as magnetostrictive materials, TbFe₂ and (Tb_0.3Dy_0.7)Fe_2-X, could be synthesized by containerless solidification, splat solidification from homogeneous melts and unidirectional solidification in magnetic fields in microgravity, respectively.

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Recent research of new energy technology for advanced vehicles

Noboru SATO

2002 Volume 14 Issue 4 Pages 151-156
Published: March 15, 2003
Released on J-STAGE: February 25, 2010

DOIhttps://doi.org/10.2978/jsas.14.151

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New energy vehicles like Hybrid Electric Vehicle and Fuel Cell Vehicle are expected for the reduction of CO₂ emission. Secondary batteries for HEV and functional materials such as platinum catalyst, polymer electrolyte, or hydrogen storage for FCV are key factors to dominate their vehicle performances. The current status of these technologies are reviewed and discussed.

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Future of biomedical engineering

Hiroshi OHSHIMA, Naoaki KANAI, Kiyoyuki YAMAZAKI

2002 Volume 14 Issue 4 Pages 157-159
Published: March 15, 2003
Released on J-STAGE: February 25, 2010

DOIhttps://doi.org/10.2978/jsas.14.157

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Current situation of therapeutic and diagnostic equipments and their clinical aspects are described. Topics of clinical applications and expected status of regenerative and gene engineering are also reviewed. Contributions of new clinical technology and several low invasive medical equipments are discussed for medical care system in incoming era.

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Wearable chemical sensors for physiological applications

Kohji MITSUBAYASHI

2002 Volume 14 Issue 4 Pages 160-164
Published: March 15, 2003
Released on J-STAGE: February 25, 2010

DOIhttps://doi.org/10.2978/jsas.14.160

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Wearable oxygen and conductimetric sensors were constructed by microfabrication techniques for monitoring biochemical substances. The wearable oxygen sensor (thickness 84μm) was calibrated against dissolved oxygen from 0 to 8.0mg/l, and could be used to monitor the transcutaneous oxygen pressure by applying onto the forearm skin surface. Tear fluid conductivity was possible to be measured by applying the wearable sensor to the human subject's temporal lower cul-de-sac, thus evaluating electrolyte concentration and turnover rate in tear for normal, healthy volunteers and dry-eye patients.

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Recent progress in non-invasive imaging of Internal body temperature using the water proton chemical shift

Kagayaki KURODA

2002 Volume 14 Issue 4 Pages 165-169
Published: March 15, 2003
Released on J-STAGE: February 25, 2010

DOIhttps://doi.org/10.2978/jsas.14.165

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The water proton chemical shift observed in magnetic resonance is a measure of internal body temperature. The phase mapping method using this parameter has yielded a practical tool of non-invasive temperature imaging for monitoring thermal therapies, although the temperature coefficient of this parameter is small (-0.01ppm /°C).

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Processing for nanostructured alloys

Toshiro KUJI

2002 Volume 14 Issue 4 Pages 170-173
Published: March 15, 2003
Released on J-STAGE: February 25, 2010

DOIhttps://doi.org/10.2978/jsas.14.170

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Nanostractural alloys have attracted growing interest because of their potential properties. The recent studies on nanostructured alloys imply the reality of alloy designing without restriction by the equilibrium phase diagram. We review recent results in new alloys developed by mechanical alloying technique and emphasize their potentiality as future materials.

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