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  • 1995-1999  (4)
  • 1
    Electronic Resource
    Electronic Resource
    A four-point surface conductivity probe suitable for in situ ultrahigh vacuum conductivity measurements (1997)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 68 (1997), S. 1812-1813 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A simple design for a four-point probe suitable for precision surface conductivity measurements is described. Our design makes use of small, commercially available spring contact probes which are mounted in a custom built MACOR ceramic probe head. The design is suitable for use in ultrahigh vacuum applications, and the custom-built parts can be fabricated in any machine shop. Very reproducible values were obtained using this probe for surface conductivity measurements on a MoS2(0001) model catalyst, a sputter deposited indium-tin oxide thin film and a doped silicon wafer. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1147968
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    A virtual instrument approach for automation of temperature programmed desorption (1998)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 69 (1998), S. 3707-3708 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: LabVIEW provides a method to create a user friendly automated Virtual Instrument that can be programmed to perform simultaneous display and control functions from several different laboratory instruments. This note describes how LabVIEW was used to create a temperature programmed desorption virtual instrument to facilitate easy control of sample temperature and data collection and handling. The program is easy to use, fairly versatile for different types of catalysis samples, and the data collected can be imported into most spreadsheets. The program as written controls the temperature in a linear fashion with very little deviation from the user defined ramp. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1149165
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Inexpensive ultrahigh vacuum heatable/coolable xyz-rotary motion sample manipulator (1995)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 66 (1995), S. 3048-3050 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A simple design for a heatable, coolable, rotatable sample manipulator, suitable for ultrahigh vacuum (UHV) applications, is described. Highlights of the design include using a combination power/thermocouple feedthrough for heating, cooling, and temperature measurement; and the use of primarily "off-the-shelf'' components available from most UHV components vendors. The described manipulator is capable of sample cooling to ∼100 K, sample heating to above 900 K, while maintaining 360° of rotary motion, ∼1 in. of x and y motion, and 2 in. of z motion. The apparatus can be assembled for approximately $5500 (all new parts) and uses about 3 3l of liquid N2 per day. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1145527
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Arterial–Pulse Oximetry Loops: A New Method of Monitoring Vascular Tone (1997)
    Springer
    Journal of clinical monitoring and computing 13 (1997), S. 223-228 
    Details
    ISSN: 1573-2614
    Keywords: Equipment ; pulse oximeter ; plethysmograph ; compliance ; vascular resistance
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Medicine
    Notes: Abstract Objective. We report the off-line calculation of the vascular complianceof the finger and suggest the continuous on-line use of this methodology asan aid to monitoring the peripheral vascular resistance. This method consistsof the simultaneous analysis of the waveform signals from the pulse oximetermonitors and the arterial pressure as indicators of “volume” andpressure respectively to continuously calculate the vascular“compliance” (volume change per unit pressure change). This shouldbe seen as a “relative compliance” as the pulse plethysmographsignal is not calibrated. This new methodology allows for continuousmonitoring of peripheral vascular compliance as a beat-to-beat indicator ofperipheral vascular resistance. The vaso-constrictors, phenylephrine andephedrine, were shown to decrease the compliance as predicted. Methods. Thearterial pressure and pulse oximeter waveforms were obtained during routineanesthetic care. The waveforms were collected with a computer data-acquisitionsystem and then analyzed “off-line” as an indirect indicator oftotal vascular tone. Demographic and clinical information including drugadministration were recorded. Results. A case report is presented using thisnew form of analysis. Vascular compliance changes induced by phenylephrine andephedrine were studied. A dose response curve of peripheral vascularcompliance to phenylephrine was generated from these data. Conclusions. Byplotting the pulse oximeter waveforms versus the arterial waveforms, multiplevolume versus pressure (relative compliance) loops were obtained. Analysis ofthese loops may assist in the monitoring of vascular compliance.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1007361020825
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    Paper (German National Licenses)
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