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  • 2005-2009  (2)
  • 1990-1994  (9)
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  • 1
    Electronic Resource
    Electronic Resource
    Characterization of ultrathin oxide prepared by low-temperature wafer loading and nitrogen preannealing before oxidation (1992)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 72 (1992), S. 1378-1385 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: In this study, we report a high-performance ultrathin oxide (≈80 A(ring)) prepared by a low-temperature wafer loading and N2 preannealing before oxidation. This recipe can reduce native oxide thickness and thermal stress compared to the conventional oxidation recipe. The high-resolution transmission electron microscopy reveals that the SiO2/Si interface is atomically flat, and a thin crystalline-like oxide layer about 7 A(ring) exists at the interface. Oxides prepared by the proposed recipe show a very high dielectric breakdown field (≥16 MV/cm) and a very low interface state density (Nit ≈ 3 × 109 eV−1 cm−2 at midgap). The effective barrier height at cathode derived from the slopes of log(Jg/E2ox) vs 1/Eox and tbd vs 1/Eox plots is about 3.9 eV, instead of 3.2 eV for the control sample. It also shows a better immunity to the charge trapping and interface state generation under high-field stressing, and superior time-dependent dielectric breakdown characteristics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.351749
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  • 2
    Electronic Resource
    Electronic Resource
    Barrel-Valve Assembly Affects Twin-Screw Extrusion Cooking of Corn Meal (1994)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 59 (1994), 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: The effects of a barrel-valve assembly on extrusion system dynamics and product properties with various screw speeds and specific feeding loads (SFL) were studied using an APV Baker twin-screw extruder. Turning the barrel-valve from the open to closed position resulted in a convex response of die pressure due to the axial offset of paired orifice plugs, with concomitant changes in system responses and extrudate properties. Variations in SFL by changing feed rate or screw speed caused more pronounced effects on product properties compared with barrel-valve control.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1994.tb08151.x
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  • 3
    Electronic Resource
    Electronic Resource
    A size of ∼1  au for the radio source Sgr A* at the centre of the Milky Way (2005)
    [s.l.] : Nature Publishing Group
    Nature 438 (2005), S. 62-64 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Although it is widely accepted that most galaxies have supermassive black holes at their centres, concrete proof has proved elusive. Sagittarius A* (Sgr A*), an extremely compact radio source at the centre of our Galaxy, is the best candidate for proof, because it is the closest. ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/nature04205
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  • 4
    Electronic Resource
    Electronic Resource
    The deformedN=60 nucleus 41 101 Nb (1991)
    Springer
    The European physical journal 340 (1991), S. 5-16 
    Details
    ISSN: 1434-601X
    Keywords: 23.20.Ck ; 2320.Lv ; 27.60.+j
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The β− decay of101Zr has been investigated at the fission-product separators JOSEF and LOHENGRIN. The half-life of101Zr has been determined to 2.5(1) s and a level scheme for101Nb has been established fromγ ray singles as well as X/3-γ and γ—γ coincidence measurements. Conversion coefficients for transitions in101Nb and level half-lives between 10 ps and 2 ns have been determined. Three rotational bands are identified among the low-lying levels with band heads at 0 keV, 206 keV and 208 keV. The bands are probably based on the Nilsson configurations [422 5/2+], [301 3/2−] and [303 5/2−], respectively. The deformation has been determined to βq=0.40(4) and 0.41(8) for the ground state band and the band based on the 206 keV level from the half-lives of the first and second excited members of these bands. This shows that the rapid onset of deformation at N=60 which is typical for the A=100 region of neutron-rich nuclei, takes also place in the Nb isotopes. Nilsson model calculations describe the experimental data well, especially the several determined transition probabilities including those for E1 transitions from the 206 and 208 keV band heads to the ground state.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01284474
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  • 5
    Electronic Resource
    Electronic Resource
    On theβ − decay of the 2s isomer in98Y and the existence of an intruder band in98Zr (1994)
    Springer
    The European physical journal 347 (1994), S. 287-288 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The γ radiation from the ß− decay of the high-spin isomer in98Y has been studied at the separator JOSEF. A main goal was to get insight into the spins of levels in98Zr which have been interpreted as members of an intruder band based on the 02 + state at 854 keV. The measuredγ-γ angular-correlations lead to the assignment of spins of 4 and 3 ℏ to the 2491 and 1844 keV levels, respectively, and contradict their interpretation as the 6+ and 4+ states of the proposed band. For the 2.0s isomer of98Y, the ß{−}-decay properties suggest I=5 with a major configuration [πg9/2,νs1/2(g2 7/2)0].
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01289798
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  • 6
    Electronic Resource
    Electronic Resource
    Quantitative clinical assessment of disease activity in systemic lupus erythematosus: progress report and research agenda (1991)
    Springer
    Rheumatology international 11 (1991), S. 133-136 
    Details
    ISSN: 1437-160X
    Keywords: SLE ; BILAG ; SLEDAI ; SLAM
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary No single test allows an adequate measure of disease activity in multisystem diseases such as systemic lupus erythematosus (SLE). In order to evaluate the spectrum of manifestations of disease activity in SLE, investigators have developed numerous ad hoc scales which have not been tested for their validity or reliability. Three instruments have been extensively studied: the British Isles Lupus Activity Group instrument (BILAG), the SLE Disease Activity Index (SLEDAI), and the Systemic Lupus Activity Measure (SLAM). All three have been demonstrated to have convergent and construct validity when compared to the clinician's judgement. The summation of the number of criteria of the American Rheumatism Association (ARA) SLE criteria has been shown to be an inadequate measure of disease activity. Standardized measures of disease activity for SLE should enhance our ability to compare results from different centers in finer distinctions than dead or alive.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00304502
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  • 7
    Electronic Resource
    Electronic Resource
    Effects of Heat Treatments on the Nb〈sub〉3〈/sub〉Sn Composite Strands (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 546-549 (May 2007), p. 2023-2026 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Nb3Sn superconductors are widely used in high magnetic field application. Internal tinprocessed Nb3Sn wires used for ITER coils (at 4.2K, 12T) were heated by two steps, local heattreatment and reaction heat treatments. The superconducting properties of Nb3Sn were investigated asa function of reaction heat treatment (HT) for strands during 625℃~665℃.To study the heattreatment effects on Jcn and n-value of Nb3Sn strands, different HT-parameters, i.e., annealingtemperature and times, were applied on the Nb3Sn multifilament strands
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/16/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.546-549.2023.pdf
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  • 8
    Electronic Resource
    Electronic Resource
    Tip protectors for microsurgical instruments — an inexpensive alternative (1992)
    Springer
    European journal of plastic surgery 15 (1992), S. 102-102 
    Details
    ISSN: 1435-0130
    Keywords: Microsurgical instruments ; Needle shields
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Hypodermic needle shields may be used as tip protectors for several types of microsurgical instruments. These provide an inexpensive alternative to commercially available tip covers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00178579
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  • 9
    Electronic Resource
    Electronic Resource
    The deformation of103Nb (1992)
    Springer
    The European physical journal 344 (1992), S. 357-358 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Tie half-lives of 8 low lying levels of103Nb have been determined at the fission-product separator JOSEF. A B-γ-γ triple-coincidence method was used which consists in a measurement of the time delay between the feeding of the levels through the B− decay of103Zr and their γ decay, in coincidence with a tagging γ ray, with plastic, BaF2 and Ge detectors, respectively. Most of the investigated levels are members of the three known rotational bands based on the ground state and the 164 and 248 keV levels. The deformation Bq=0.31(3) of103Nb could be deduced from the half-life data. The half-lives are well reproduced through calculations in the frame of the Nilsson model.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01303035
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  • 10
    Electronic Resource
    Electronic Resource
    The structure of the deformed nucleus 42 103 Mo61 (1993)
    Springer
    The European physical journal 346 (1993), S. 101-109 
    Details
    ISSN: 1434-601X
    Keywords: 21.60.EV ; 23.20.Ck ; 27.60.+j
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The lifetimes of the three lowest excited members of the rotational ground-state band of103Mo at 102.6, 241.1 and 433.2 keV as well as of the levels at 353.8 and 456.1 keV have been determined through a measurement of the delayed coincidences betweenβ particles from the decay of the parent103Nb and theγ rays which depopulate the levels. A plastic and a BaF2 detector have been used for theβ andγ rays, respectively, in these experiments at the fission product separator JOSEF. The results for all three band members evince that this nucleus has a sizeable deformation, with a value ofβ q=0.34(1). This value is larger than that of the neighbouring even-even Mo isotopes which indicates an odd-even effect. On the other hand it confirms the observation that the Mo nuclei are in general less strongly deformed than their Sr and Zr isotones. Particle-rotor model calculations with the Nilsson parametersκ=0.084,μ=0.28 provide a good description of the ground-state band and of a side band based on the 346.5 keV level, including the new lifetimes. This substantiates the Nilsson orbital assignments of [411]3/2+ and [532]5/2− for these two bands, respectively, where the sideband is strongly affected by a [541]3/2− admixture. There is evidence for an additional band based on the 641.1 keV level for which the assignment [422]3/2+ is proposed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01294625
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