Fabrication of ultralow reflectivity Si surfaces by use of surface structure chemical transfer method and improvement of conversion efficiencies of crystalline Si solar cells
The surface structure chemical transfer method can form ultra-low reflectivity (less than 2 %) Si surfaces just by contact of Si wafers immersed in chemical solutions with a catalytic mesh. Using this method, high photocurrent density and high conversion efficiency can be achieved from crystalline Si solar cells without anti-reflection coating.
To improve scrolling and zooming on multi touch display, we propose a technique to employ the elastic metaphor on the displayed information. With this, users can intuitively access information that is located outside of the screen.
In conventional structural analysis FEM only the self-adjoint problem is solved, but now we can obtain the solution of non-self-adjoint problem by using this invention. This is the general logic of the multi-physics to enable various analysis such as vibration analysis, fluid analysis, electromagnetic field analysis, transmission channel analysis, the sound field analysis.
Wheeled vehicles have low ability to get over the difference in level. We proposed a simple mechanism for geometrically complete trochoid as a novel omnidirectional translation mechanism. It has also high ability to get over the difference in level. A prototype model was constructed using the mechanism. The mechanism needed to have a high suspension capability and all-wheel-drive mechanism to get over rough terrain. In this paper, an improved mechanism to generate not only steering angle and camber angle for ideal trochoid but also the angular velocity of the wheel axis was proposed.
Dissimilar material joining is a key process in the manufacture of multimaterial products. Recently, direct joining between metal and plastic with laser, so-called “LAMP joining”, has been developed to produce strong joints tightly-bonded on the nanoscale levels between stainless steel and PET sheets [Scripta Materialia,59,12(2008),1247-1250].
The invention describes how friction-stir-welding (FSW) enables the production of steel joints with extraordinarily high strength and ductility. FSW conveys these excellent properties to steel joints through the formation of a mechanically stabilized metastable austenite phase. Because the metastable austenite phase retained in the joints is transformed into the martensite phase when the joints are used, the elongation and tensile strength of the joint are significantly higher than those of the base metal. The material properties of steel generally deteriorate as steel parts are welded and joined together. Accordingly, there have previously been numerous attempts to minimize the deterioration of the mechanical properties of steel joints. The FSW produces a mechanically stabilized metastable austenite phase that actually increases the elongation and tensile strength of steel joints.
Plasma MIG brazing process enables dissimilar metal joint of aluminum to steel with lower cost compared with laser welding or FSW. In this process, weld bead with high wettability and thin intermetallic compound layer can be obtained because a base metal is heated widely suppressing melting of the base metal.
X-ray source with metal targets embedded in a diamond substrate: Control of source size and shape with size and shape of metal targets, and reduction of electron irradiation damage of metal targets due to high thermal conductivity of the substrate.
The recent increase of antibiotic-resistant bacteria emphasizes the importance of selecting appropriate antimicrobials for the treatment of infections. We propose an innovative rapid method using a new microfluidic device for antibiotic susceptibility testing.