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  • 1
    Electronic Resource
    Electronic Resource
    Electron tunneling detected by electrostatic force (2000)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 77 (2000), S. 3615-3617 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A method is introduced for measuring the tunneling of electrons between a specially fabricated scanning probe microscope tip and a surface. The technique is based upon electrostatic force detection of charge as it is transferred to and from a small (10−17 F) electrically isolated metallic dot on the scanning probe tip. The methods for dot fabrication, charging, and discharging are described and electron tunneling to a sample surface is demonstrated. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1330568
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  • 2
    Electronic Resource
    Electronic Resource
    Anaesthetic machine checklists 1 (2001)
    Oxford, UK : Blackwell Science Ltd
    Anaesthesia 56 (2001), S. 0 
    Details
    ISSN: 1365-2044
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2044.2001.2279-6.x
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  • 3
    Electronic Resource
    Electronic Resource
    Studies of local structure of Cm3+ in borosilicate glass using laser and x-ray spectroscopic methods and computational modeling (2000)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 112 (2000), S. 1489-1496 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The local environment of Cm3+ in a borosilicate glass has been probed by a combination of laser spectroscopy, structural modeling, and extended x-ray absorption fine structure (EXAFS) spectroscopy. The Stark splitting for the Cm f–f state transitions is significantly larger than the inhomogeneous line broadening that results from the disordered environment. As a result, the Cm optical spectrum can be fit using an effective operator Hamiltonian to obtain a set of crystal-field parameters. The fitting procedure, which requires the use of a descent-in-symmetry approach, provides a set of parameters for a best fit within tetragonal symmetry. These parameters are then linked to the local environment of Cm through exchange-charge modeling (ECM) of crystal field interactions. Cm in our borosilicate glass is best modeled with six oxygen ions with approximately tetragonal symmetry, and at an average distance of 2.31 (3) Å. The results of crystal-field modeling are supported by EXAFS results. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.480687
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  • 4
    Electronic Resource
    Electronic Resource
    Effusive-flow characterization of arbitrary size and geometry target/vapor transport systems: RIB applications : Papers from the Ninth International Conference on Ion Sources (2002)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 73 (2002), S. 786-788 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: The principal factors that limit intensities of short-lived radioactive ion beams produced by the isotope separator on-line technique are time delays due to diffusion of radioactive species from solid or liquid target materials and their effusive-flow transport to the ion source. Although diffusion times can be reduced by proper design of short diffusion length, highly refractory targets, effusive-flow times are more difficult to assess. After diffusion from the target material, the species must travel through the target material and vapor transport system to the ion source. The time required for effusive-flow transport to the ion source depends on the conduction path, chemical reactions between the species and target material and materials of construction, as well as the physical size and geometry of the transport system. We have developed a fast valve (0.1 ms closing time) for introducing gaseous or vapor-state species into the target/vapor transport/ion source/system that permits measurement of effusive-flow times for any gaseous or vaporous species (chemically active or chemically inactive) through any vapor transport system, independent of size and geometry. Characteristic times are determined from the exponential decay of the momentum analyzed ion beam intensity for the species during effusive flow through the vapor transport system under evaluation. This article describes the effusive-flow apparatus and presents characteristic time spectra and characteristic effusive-flow time data for noble gases flowing through a serial-flow target reservoir system. © 2002 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1430868
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  • 5
    Electronic Resource
    Electronic Resource
    Index of Diversity as Applied to Ecological Problems (1945)
    [s.l.] : Nature Publishing Group
    Nature 155 (1945), S. 390-391 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] I HAVE read with interest Mr. Jones's letter on the results of the application of the logarithmic series and the index of diversity to his quadrat observations. I completely agree with him that the theoretical basis requires further study; as also does the field application to both animals and ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/155390b0
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  • 6
    Electronic Resource
    Electronic Resource
    Yule's ‘Characteristic’ and the ‘Index of Diversity’ (1946)
    [s.l.] : Nature Publishing Group
    Nature 157 (1946), S. 482-482 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THERE have recently been two attempts to study the problem of random sampling from a mixed population in which all the constituent groups are not equally abundant. R. A. Fisher1 studied the problem of random samples of a population of insects in which the species were not equally ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/157482a0
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  • 7
    Electronic Resource
    Electronic Resource
    Climate and Insect Life (1946)
    [s.l.] : Nature Publishing Group
    Nature 157 (1946), S. 214-215 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE problem of the relation of insect life to X climate and weather conditions has always attracted naturalists, both from its scientific and its practical importance; but most of the early work was qualitative rather than quantitative and, owing to the complexity of the problem, little real ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/157214a0
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  • 8
    Electronic Resource
    Electronic Resource
    Multiple Temperature Incubator (1923)
    [s.l.] : Nature Publishing Group
    Nature 112 (1923), S. 134-134 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] IN the course of some experimental work on insects which we have been carrying out, it was necessary to have a large number of constant temperatures. As it was impossible to have a complete incubator for every temperature, an incubator was designed by Mr. T. W. Kirkpatrick and myself to give a ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/112134b0
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  • 9
    Electronic Resource
    Electronic Resource
    Sense of Smell in Birds (1922)
    [s.l.] : Nature Publishing Group
    Nature 110 (1922), S. 149-149 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] IN the issue of NATURE for June 17 there is a discussion on the inadequacy of present observations on the sense of smell in birds. Perhaps the following notes would be of interest. They are from an account of the habits of the birds of Trinidad which will be published shortly by the Department ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/110149b0
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  • 10
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    Friedrich Spee, Trutznachtigall. Mit Einleitung und kritischem Apparat herausgegeben von Gustave Otto Arlt (Book Review) (1945)
    Washington, etc. : Periodicals Archive Online (PAO)
    Germanic Review. 20:3 (1945:Oct.) 235 
    Details
    ISSN: 0016-8890
    Topics: German, Dutch and Scandinavian Studies
    Notes: BOOK REVIEWS
    URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:1091-1945-003-00-000007
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