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  • 1
    Electronic Resource
    Electronic Resource
    A stable scanning tunneling microscope designed for investigations of organic thin films in air (1997)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 68 (1997), S. 1296-1299 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A new and stable scanning tunneling microscope (STM) system has been constructed for the investigation of thin organic films in air. The STM unit is made of Macor, which is machinable ceramic and has a small thermal expansion coefficient and a high mechanical stiffness. Three-dimensional coarse position adjustment (within 3 μm) is carried out using five stacked piezoelectric transducers (PZTs). A cross-type configuration is used to prevent the thermal effect of the x- and y-direction displacement mechanism. In order to achieve high resolution, x-, y-, and z-direction displacements are performed using a tube-type PZT. The z direction of the tube PZT has a high mechanical resonant frequency of 24.4 kHz. Therefore, this STM unit is mechanically rigid, and allows stable operation under mechanical disturbances (sound and mechanical vibration). Moreover, this STM unit can be controlled for 24 h or longer by using an ordinary operational amplifier, because thermal effects are compensated. The STM system can also be used to obtain information on the spatially resolved local tunneling barrier height, which is sensitive to the chemical structure of the sample. The capabilities of this newly designed STM are demonstrated with experiments investigating the morphology and tunneling barrier height of stearic acid thin films on indium-tin-oxide substrates. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1147892
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  • 2
    Electronic Resource
    Electronic Resource
    Faraday rotation densitometry for Large Helical Device : Papers from the thirteenth topical conference on high temperature plasma diagnostics (2001)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 72 (2001), S. 1073-1076 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A CO2 laser polarimeter to measure the Faraday rotation in the large helical device (LHD) was developed and installed on a LHD. A CO2 laser whose wavelength is 10.6 μm was selected to avoid effects of the refraction. The Faraday rotation angle along toroidally tangential chords is of the order of one degree. The polarimeter utilizes the frequency-shift heterodyne technique with the use of acousto-optic modulators for high resolution. This polarimeter can be operated with a maximum of three channels. The accuracy of the Faraday rotation angle with a time resolution of 16 ms is about 0.01 deg by digital complex demodulation. We succeeded in performing preliminary measurements of the Faraday rotation angle from LHD plasmas and the values were 10%–30% larger than those estimated with the electron density profiles from interferometry. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1321742
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  • 3
    Electronic Resource
    Electronic Resource
    Skin infection caused by Mycobacterium avium (1997)
    Oxford, UK : Blackwell Publishing Ltd
    British journal of dermatology 136 (1997), S. 0 
    Details
    ISSN: 1365-2133
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: A patient with skin infection due to Mycobacterium avium is reported. A 9–year–old female had 10 subcutaneous nodules and two ulcers on the abdomen and legs. She had no medical history of systemic disease, skin disease or immunosuppressive therapy. Cultures of a biopsy specimen and of aspirated seropurulent fluid in nodules showed acid–fast bacteria, identified as M. avium by the DNA–DNA hybridization method. We treated her with a combination of surgery and the antibiotics, cycloserine, isoniazid and clarithromycin.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2133.1997.d01-1183.x
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  • 4
    Electronic Resource
    Electronic Resource
    Two-step synthesis of a triketone of the endo-tetracyclo[5.5.1.02,6.O13]tridecane series. X-ray crystallographic proof of its structure and stereochemistry (1973)
    s.l. : American Chemical Society
    The @journal of organic chemistry 38 (1973), S. 2919-2920 
    Details
    ISSN: 1520-6904
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/jo00956a047
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  • 5
    Electronic Resource
    Electronic Resource
    Synthesis and x-ray structure determination of the photoproducts of A-homocholestan-3-one (1975)
    s.l. : American Chemical Society
    The @journal of organic chemistry 40 (1975), S. 3675-3680 
    Details
    ISSN: 1520-6904
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/jo00913a013
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  • 6
    Electronic Resource
    Electronic Resource
    Atomic force microscopy using an integrated comb-shape electrostatic actuator for high-speed feedback motion (2000)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 76 (2000), S. 3139-3141 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A microfabricated cantilever with integrated comb-shape electrostatic actuator is proposed to yield a high-speed feedback motion in atomic force microscopy with optical deflection detection. The actuator has a linear response to the driving voltage. The dynamic range of tip amounts to 1 μm with an actuation efficiency of 11.4 nm/V. Using this cantilever, an imaging bandwidth of ∼80 kHz was obtained. High-speed constant force imaging with a tip velocity of 1.22 mm/s is demonstrated. The tip-sample force is verified to be constant by using a cantilever with an integrated piezoresistor as the scanned sample. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.126549
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  • 7
    Electronic Resource
    Electronic Resource
    Conical diamond tips realized by a double-molding process for high-resolution profilometry and atomic force microscopy applications (2000)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 76 (2000), S. 1621-1623 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: High aspect ratio diamond tips with a small radius of curvature were fabricated by means of a double-molding process and hot-filament chemical vapor deposition of diamond. The tips proved to perfectly reproduce the geometry of anisotropically etched silicon tips, which were used as first mold. The diamond tips were mounted on stubs for contact profilometry imaging as well as transferred to cantilevers for atomic force microscopy measurements. Both profilometry and atomic force microscopy investigations have demonstrated the high application potential of these tips. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.126115
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  • 8
    Electronic Resource
    Electronic Resource
    Fiberoptic heterodyne magnetic field sensor for long-pulsed fusion devices : Papers from the thirteenth topical conference on high temperature plasma diagnostics (2001)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 72 (2001), S. 413-416 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A heterodyne polarimeter which measures the Faraday effect has been under development as a magnetic field sensor for long-pulsed fusion devices. The wavelength of laser beam was chosen to be 850 nm since the radiation-induced loss in optical fibers is significant below 800 nm while the Faraday rotation angle decreases with increasing wavelength. By the use of a distributed Bragg reflector laser diode and a Faraday isolator, excellent stability of phase measurement was attained. The phase resolution was raised to up to 0.02° by the digital complex demodulation and digital bandpass filtering of beat signals. Although the Verdet constant of heavily Tb3+-doped paramagnetic glass is larger than that of ZnSe by about a factor of 1.4, ZnSe is superior to the former in terms of negligible temperature dependence. With a 40-mm-long ZnSe sensing rod, resolutions of the magnetic field strength of about 5 and 2 G were found to be possible with time responses of 1 and 10 ms, respectively. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1316751
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  • 9
    Electronic Resource
    Electronic Resource
    Non-Markoffian theory of quantum beats in molecular fluorescence (1986)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 84 (1986), S. 2112-2119 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: We develop a theory of quantum beats in molecular fluorescence taking into account collision effects (such as pure dephasing due to elastic collision) without invoking the Markoff approximation. Model calculations of the time dependent fluorescence from molecules with two excited levels are performed in order to see how the non-Markoffian character in the collision process exerts influence upon the quantum beat pattern. It is suggested that if the pure dephasing between the excited states is a Markoffian "the degree of modulation of the beats'' decreases exponentially with time; if it is in the static limit the degree of modulation of the beats decreases as a Gaussian function (the non-Markoffian behavior in the quantum beats). A given case can be classified as either Markoffian or non-Markoffian, depending on the relative magnitudes of the collision duration time τc, the beat frequency ω, and the coupling strength v which is characteristic of the pure dephasing process. The Markoff approximation holds only if the condition ω〈v〈1/τc is satisfied; the non-Markoffian behavior appears in the quantum beat pattern when ω〉v, even if v2τ2c〈1 .
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.450422
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  • 10
    Electronic Resource
    Electronic Resource
    Heat and Moisture Transfer and Hygrophysical Changes in Elastoplastic Hollow Cylinder-food During Drying (2000)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 65 (2000), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: There are many dried foods of hollow cylinder-shapes in the market. Hygrostress cracks form in these foods during drying without a careful process control. The objective of the present work was to develop a simulation method for heat and moisture transfer in hollow cylinder-food coupled with hygrophysical changes. A modified Luikov's model was used for the development together with a virtual work minimization principle, critical tensile stress criterion for crack formation, and critical crack-tip-opening angle criterion for crack propagation. The developed, computerized simulation model was validated through drying experiments of samples made from a starch hydrate.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.2000.tb16000.x
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