modified rod-in-tube method for low-loss silica fibers

the method is characterized by the surface treatment technique in which the surfaces of a core rod and a cladding tube are treated with a mixture of specific gas and oxygen under high temperature after insertion of the core rod into the cladding tube. this technique has enabled elimination of scattering loss caused by interface imperfecti..

the application of microprocessors to a fully automatic washing machine

improvements in fully automatic washing machines have been concentrated in the mechanical elements, but from the point of view of resource- and energy-saving, and the need to handle an increasing variety of garments, there has been a growing demand for control systems of greater sophistication. problems have arisen with conventional mecha..

semiconducting tio/sub 2/ films for photoelectrolysis of water

these films have been fabricated by thermal oxidation of titanium plates at reduced pressure. excellent results are obtained in specimens heat treated at 900 degreesc for 10 min under a pressure of 5*10/sup -2/ torr. the electrode performance is influenced significantly by the surface treatment of specimens before the oxidation process

evaluation of polymeric materials by cell culture method

a new evaluation method for the biocompatibility of polymeric materials was devised using the proliferation of bhk-21 clone-13 cells. bhk cells cultured on a cover glass are brought in contact with the surface of a polymer and the growth of cells on the surface is examined. the method is simple and will be useful as an auxiliary to an imp..

carbon fiber surfaces-characterization, modification and effect on the fracture of high modulus fiber-polymer composites

the types of existing fibre surface treatments, the resulting changes in the fibre surface properties, and the effects of the surface condition on the microfracture of oriented carbon fiber-polymer composites are discussed

description of a unique machine tool permitting achievement of <15-a rms diamond-turned surfaces

copper surfaces of revolution have been produced with a 12.3-aa rms surface finish and a contour accuracy of 75 nm. the cutting tool is programmed to move in 4 nm increments along two axes' one linear (x) axis and one circular (omega) axis exceptionally stiff and accurate control of the tool is possible with this 'omega-x' system. in conj..

the perspectives of the microwave treatment of filaments

thermal treatment of filaments is presently obtained by conventional techniques as regards texturization, polymerization and various drying processes. the results of studies concerning a microwave cavity loaded with a lossy coaxial material are presented this process allows an efficient thermal treatment of these filaments although they h..

the effect of chemical surface treatments on non-native (bi/sub 2/o/sub 3/) gaas metal-insulator-semiconductor solar cells

gaas metal-insulator-semiconductor solar cells with a physically deposited bi/sub 2/o/sub 3/ interfacial layer have been investigated. the deposition techniques used in the study were electron beam and boat thermal evaporation. the cells fabricated with interfacial layers of bi/sub 2/o/sub 3/ showed a substantial improvement in open-circu..

preparation of ggg substrates for epitaxy of magnetic garnets

deals with the preparation of magnetic epitaxial layers used in magnetic bubble memories. a technological process of fabricating garnet substrates from a massive gd/sub 3/ga/sub 5/o/sub 12/ monocrystal prepared by the czochralski method is described. the process has been developed with regard to its adaptability to the industrial si techn..

micromachining applications for icf target fabrication

micromachining techniques used in inertial confinement fusion (icf) target fabrication encompass laser drilling, single point diamond turning, and plasma as well as chemical etching. these techniques have been developed by several laboratories to produce target components with tolerances and surface finishes in the micron to submicron reg..