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  • 1
    Digitale Medien
    Digitale Medien
    The ECR ion source DECRIS : Proceedings of fifth international conference on ion sources (1994)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 65 (1994), S. 1084-1086 
    Details
    ISSN: 1089-7623
    Quelle: AIP Digital Archive
    Thema: Physik , Elektrotechnik, Elektronik, Nachrichtentechnik
    Notizen: The design of the electron cyclotron resonance (ECR) multicharged ion source DECRIS (Dubna ECR ion source, 14 GHz) was started at the Flerov Laboratory of Nuclear Reactions at the beginning of 1990 and in January 1992 the first plasma was ignited. A classical magnetic configuration based on the MINIMAFIOS with some "features'' served as the basis for the source design. The DECRIS was installed on the ECR test bench. The first study of the source was carried out in continuous mode of operation at strict control of hexapole temperature. The ion source has been tested with He, N, O, and Ar ions. The results of these initial measurements are presented.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.1145070
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  • 2
    Digitale Medien
    Digitale Medien
    Radiation from flexural vibrations of the baseplate and their effect on the accuracy of traveltime measurements (2005)
    PO Box 1354, 9600 Garsington Road , Oxford OX4 2XG , UK . : Blackwell Science Ltd
    Geophysical prospecting 53 (2005), S. 0 
    Details
    ISSN: 1365-2478
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Geologie und Paläontologie , Physik
    Notizen: We analyse the problem of radiation of seismic waves by a vibroseis source when the baseplate is subject to flexure. A theoretical model is proposed to account for baseplate flexure, generalizing the well-known model of the vibroseis source of Sallas and Weber, which was developed for a rigid plate. Using the model proposed, we analyse the effect of flexure on the properties of seismic waves. We show that the flexure does not contribute to the far-field and mainly affects the readings of the reference accelerometer that is used to measure the force applied to the ground; these readings generally become dependent on the location of the sensor on the plate. For muddy and sandy soils, the effect of flexure on baseplate-acceleration measurements is nonetheless pronounced at the high end of the vibroseis frequency band only (∼100 Hz), and is negligible at all frequencies for stiffer soils. The corresponding phase lags introduced by the flexural vibrations at high frequencies lead to errors in the traveltime measurements (through the cross-correlation function) of up to 0.6 ms for muddy soils and less for denser soils. We show the existence of an optimal position of the reference sensor on the baseplate and also propose a general method of eliminating the phase lag due to the baseplate flexure in acceleration measurements.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1365-2478.2005.00492.x
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  • 3
    Digitale Medien
    Digitale Medien
    Optical absorption spectroscopy of synthetic tourmalines (1993)
    Springer
    Physics and chemistry of minerals 20 (1993), S. 209-220 
    Details
    ISSN: 1432-2021
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie , Geologie und Paläontologie , Physik
    Notizen: Abstract Tourmaline solid solutions containing Fe, Fe+ Ti, Cr, Ni, Cu, Co, Mn chromophoric centers have been grown hydrothermally at 650° C and 1,5 kbar on natural seeding plates close to the elbaite composition. The newly grown tourmalines were characterized by chemical analyses and optical absorption spectroscopy in the range 26316-5000 cm-1 at 297 K and in the range 26316-9090 cm-1 at 77 K. Most characteristic of Fe2+, Fe3+-bearing specimens is the presence of intensive σpolarized absorption bands caused by exchange-coupled Fe2+-Fe3+ pairs in Y- and Z-sites of the tourmaline structure. An additional intensive absorption band 12500 cm-1 (σ-polarisation) appears in some specimens but is not yet found in spectra of natural tourmalines. The colour and spectroscopic properties of the Fe3+, Mn3+ and Cu2+ containing tourmalines are significantly affected by the presence of even the smallest Li-contents. The results suggest that Fe2+, Cu2+, Co2+, Ni2+-ions occupy, predominantly, Y-sites of the tourmaline structure, whereas the Cr3+-ions seem to enter the smaller Z-octachedra.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00200123
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  • 4
    Digitale Medien
    Digitale Medien
    Suppression of betatron oscillations in strong-focusing electron synchrotrons (1958)
    Springer
    Atomic energy 5 (1958), S. 1471-1475 
    Details
    ISSN: 1573-8205
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Energietechnik , Physik
    Notizen: Abstract Different methods are considered for obtaining radiation damping of synchrotron and betatron oscillations in a strong-focusing accelerator. Formulas are given for the calculation of the damping decrements. It is noted that the curvature of the orbits in the damping magnets must be different from the curvature in the main sectors. It is shown that the sum of damping decrements is the same in all cases and is independent of the type of damping system which is employed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01498491
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  • 5
    Digitale Medien
    Digitale Medien
    Synthesis and transformations of 2-amino-1,3,4-thiadiazines (1991)
    Springer
    Chemistry of heterocyclic compounds 27 (1991), S. 442-446 
    Details
    ISSN: 1573-8353
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Abstract Depending on the reaction conditions, 2-amino-1,3,4-thiadiazine and 2-hydrazinothiazole derivatives were obtained by cyclization of thiosemicarbazide with ethyl bromopyruvate in concentrated hydrochloric acid. The rearrangements of 5-carbonyl-substituted 2-amino-1,3,4-thiadiazines to thiazole derivatives in an acidic medium were studied.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00480848
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  • 6
    Digitale Medien
    Digitale Medien
    Pharmacokinetics of emoxipine in normal animals and models of experimental pathology (1990)
    Springer
    Bulletin of experimental biology and medicine 110 (1990), S. 1372-1374 
    Details
    ISSN: 1573-8221
    Schlagwort(e): infarct ; stress ; pharmacokinetics ; emoxipine
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00842289
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  • 7
    Digitale Medien
    Digitale Medien
    Elastoplastic failure of sheets with cracks in biaxial tensile loading (1991)
    Springer
    Materials science 27 (1991), S. 574-577 
    Details
    ISSN: 1573-885X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00732105
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  • 8
    Digitale Medien
    Digitale Medien
    The neurophysiological parameters of human memory (1994)
    Springer
    Neuroscience and behavioral physiology 24 (1994), S. 254-259 
    Details
    ISSN: 1573-899X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Abstract The images of human working memory are coded by systems of cyclically repeating cerebral processes. The dominant frequency of the cyclical oscillations in an alpha rhythm focus, approximately 10 Hz, and the duration of the relative refractoriness after the impulse discharge of the neuron, approximately 0.01 sec, determine the diversity of the character of the bioelectrical activity of the human brain, and thereby determine the capacity and speed of working memory. The higher the frequency and the briefer the refractory state, the greater the capacity and the speed of memory. Methods for the assessment of both parameters on the basis of the individual characteristics of the human electroencephalogram in the state of its relative rest are indicated. Formulas are presented for the calculation of the capacity of memory and the duration of the operations of collation of images perceived and those stored in memory.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02362031
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  • 9
    Digitale Medien
    Digitale Medien
    Intensification of iron ore sintering process (1957)
    Springer
    Metallurgist 1 (1957), S. 297-298 
    Details
    ISSN: 1573-8892
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00814207
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  • 10
    Digitale Medien
    Digitale Medien
    Application of sinter in open-hearth melting (1958)
    Springer
    Metallurgist 1 (1958), S. 374-377 
    Details
    ISSN: 1573-8892
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00733650
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