In-situ growth of superconducting NdFeAs(O,F) thin films by Molecular Beam Epitaxy

The recently discovered high temperature superconductor F-doped LaFeAsO and related compounds represent a new class of superconductors with the highest transition temperature (Tc) apart from the cuprates. The studies ongoing worldwide are revealing that these Fe-based superconductors are forming a unique class of materials that are interesting from the viewpoint of applications. To exploit the high potential of the Fe-based superconductors for device applications, it is indispensable to establish a process that enables the growth of high quality thin films. Efforts of thin film preparation started soon after the discovery of Fe-based superconductors, but none of the earlier attempts had succeeded in an in-situ growth of a superconducting film of LnFeAs(O,F) (Ln=lanthanide), which exhibits the highest Tc to date among the Fe-based superconductors. Here, we report on the successful growth of NdFeAs(O,F) thin films on GaAs substrates, which showed well-defined superconducting transitions up to 48 K without the need of an ex-situ heat treatment

In situ growth of superconducting NdFeAs(O,F) thin films by molecular beam epitaxy

Superconducting NdFeAs(O,F) thin films were grown on GaAs substrates by molecular beam epitaxy. Films grown with a sufficiently long growth time exhibited a clear superconducting transition with an onset temperature up to 48 K and zero resistance temperature up to 42 K without the need of an ex situ annealing process. Electron probe microanalysis and Hall coefficient measurements indicated that the superconducting films are doped with fluorine, and depth-profile analysis by Auger electron spectroscopy revealed the formation of a NdOF layer near the surface, which is probably connected with the fluorine doping.journal articl

村の選択 : 馬路村調査報告

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Regional Studies Created Through Practical Education : Learning from Natural Sustenance Activities

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伊勢国における北条氏一門領

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触覚マウスによる図形情報の識別(論文<小特集>ヒューマンインタフェース)

To provide visually-impaired people access to graphical information, we previously developed a device called a "tactile mouse." It consists of a computer mouse and a small tactile display. Tactile information is fed back to the fingers according to the mouse's movements, giving the user the feeling of exploring tangible drawings. Because the tactile display is small, however, users tend to deviate from the tangible graphics when they move the mouse too much. To identify conditions for reducing this deviation, we conducted two experiments : one on line following and one on shape discrimination. We found that when the parameter called "hand-movement-to-pin ratio" was too low, the chances of deviation increased, and when it was too high, discrimination failures occurred more frequently. Consequently, intermediate conditions that led to less deviation and fewer discrimination failures were found to be adequate for the efficient use of the tactile mouse.journal articl

Relationship between reported net usage (proportion of people sleeping under nets) and net ownership (number of nets per person)

<p><b>Copyright information:</b></p><p>Taken from "Cost-sharing strategies combining targeted public subsidies with private-sector delivery achieve high bednet coverage and reduced malaria transmission in Kilombero Valley, southern Tanzania"</p><p>http://www.biomedcentral.com/1471-2334/7/121</p><p>BMC Infectious Diseases 2007;7():121-121.</p><p>Published online 25 Oct 2007</p><p>PMCID:PMC2211306.</p><p></p

The frequency distribution of the age of nets in houses sampled for mosquitoes () and () a 15-year old polyethylene net still in use in Namwawala village, July 2004

<p><b>Copyright information:</b></p><p>Taken from "Cost-sharing strategies combining targeted public subsidies with private-sector delivery achieve high bednet coverage and reduced malaria transmission in Kilombero Valley, southern Tanzania"</p><p>http://www.biomedcentral.com/1471-2334/7/121</p><p>BMC Infectious Diseases 2007;7():121-121.</p><p>Published online 25 Oct 2007</p><p>PMCID:PMC2211306.</p><p></p> This net was verified to still be in use at the time of publication, 18 years after initial distribution

Crude biting rate estimates for mosquitoes (B) and monthly rainfall measurements in the Kilombero Valley during the study period

<p><b>Copyright information:</b></p><p>Taken from "Cost-sharing strategies combining targeted public subsidies with private-sector delivery achieve high bednet coverage and reduced malaria transmission in Kilombero Valley, southern Tanzania"</p><p>http://www.biomedcentral.com/1471-2334/7/121</p><p>BMC Infectious Diseases 2007;7():121-121.</p><p>Published online 25 Oct 2007</p><p>PMCID:PMC2211306.</p><p></p> Thin solid line: ; thick solid line: ; thin dotted line: species

The distribution of sex and physiological status of mosquitoes caught in CDC light traps during the course of the study

<p><b>Copyright information:</b></p><p>Taken from "Cost-sharing strategies combining targeted public subsidies with private-sector delivery achieve high bednet coverage and reduced malaria transmission in Kilombero Valley, southern Tanzania"</p><p>http://www.biomedcentral.com/1471-2334/7/121</p><p>BMC Infectious Diseases 2007;7():121-121.</p><p>Published online 25 Oct 2007</p><p>PMCID:PMC2211306.</p><p></p