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  • 1
    Electronic Resource
    Electronic Resource
    In situ resistivity measurement of cobalt silicide formation (1987)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 62 (1987), S. 2290-2294 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: In situ resistivity measurements have been utilized to study the reaction and silicide formation between cobalt and amorphous silicon thin films from room temperature to 800 °C. In conjunction, structure and composition changes were analyzed by x-ray diffraction and Rutherford backscattering spectrometry. Formation of Co2Si, CoSi, and CoSi2 were observed. Interfacial reaction to form Co2Si occurs at approximately 400 °C. In bilayers of excess silicon, CoSi forms at approximately 520 °C and, if free silicon is still present, CoSi2 forms at about 550 °C. In the case of excess cobalt, Co2Si forms first and is followed by a cobalt-rich solid solution. Co3Si silicide was not observed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.339486
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  • 2
    Electronic Resource
    Electronic Resource
    On Hydrodynamics of Astrophysical Jets (1986)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 470 (1986), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1986.tb48020.x
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  • 3
    Electronic Resource
    Electronic Resource
    Vapor pressure of .alpha.-samarium and .alpha.-ytterbium (1973)
    s.l. : American Chemical Society
    Journal of chemical & engineering data 18 (1973), S. 140-141 
    Details
    ISSN: 1520-5134
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/je60057a004
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  • 4
    Electronic Resource
    Electronic Resource
    Mating Reaction and its Daily Rhythm in Euplotes crassus (1974)
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 21 (1974), S. 0 
    Details
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The agglutinative mating reaction of Euplotes crassus occurred without lag if complementary mating types were brought together under appropriate conditions. Only a small fraction of the cell population reacted at the beginning but the number of reacting cells steadily increased until firmly united pairs were formed after ∼30 min. The intensity of the initial mating reaction changed rhythmically; the rhythm appeared circadian. Mating-type-specific soluble factors did not appear to participate in this reaction. The results strongly support the positive-feedback hypothesis of the mating reaction presented by Heckmann & Siegel in 1964. Patterns of preconjugant cell interactions of different ciliates are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1550-7408.1974.tb03706.x
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  • 5
    Electronic Resource
    Electronic Resource
    The real value of Mercury's perihelion advance (1986)
    [s.l.] : Nature Publishing Group
    Nature 320 (1986), S. 39-41 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] According to general relativity, the predicted perihelion precession rate (?) is given by2 ? = 6p GM / Pa (1-e2) c2(1) where G is the newtonian gravitational constant, M‚(c) is the mass of the Sun and a, e and P are the semi-major axis, eccentricity and orbital period of Mercury, respectively, ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/320039a0
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  • 6
    Electronic Resource
    Electronic Resource
    Long-term changes in the semimajor axes of the outer planets (1986)
    [s.l.] : Nature Publishing Group
    Nature 319 (1986), S. 386-388 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Two centuries ago, Lagrange showed that to a first order in the masses of the perturbing planets (in units of the mass of the Sun; Mo= 103 at most, in the case of Jupiter), the semi-major axes are subject only to short periodic changes whose frequencies are linear combinations of the mean motions ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/319386a0
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  • 7
    Electronic Resource
    Electronic Resource
    Evaluation of a new oral analgesic (diviminol, Z. 424) in post-partum pain (1971)
    Springer
    European journal of clinical pharmacology 3 (1971), S. 119-122 
    Details
    ISSN: 1432-1041
    Keywords: Codeine ; placebo ; double-blind study
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary In a double-blind study the analgesic activity of a new compound, diviminol 100 mg, was compared with that of codeine 60 mg, and a placebo given as single oral doses to three comparable groups of 30, 31 and 32 patients with post-partum pain. The two drugs were very significantly more active than the placebo on comparing both the hourly pain relief scores, and the frequency of satisfactory analgesia. There was no significant difference between the new drug and the reference coumpound. No undesirable side-effects were noted. These results in post-partum pain provide additional evidence that diviminol is a clinically effective analgesic agent.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00619305
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  • 8
    Electronic Resource
    Electronic Resource
    Facets and lifting procedures for the set covering polytope (1989)
    Springer
    Mathematical programming 45 (1989), S. 111-137 
    Details
    ISSN: 1436-4646
    Keywords: Independence systems ; set covering ; polytope ; facet
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mathematics
    Notes: Abstract Given a family of subsetsℱ of an arbitrary groundsetE, acover ofℱ is any setC ⊂E having non-empty intersection with every subset inℱ. In this paper we deal with thecovering polytope, i.e., the convex hull of the incidence vectors of all the covers ofℱ. In Section 2 we review all the known properties of the covering polytope. In Sections 3 and 4 we introduce two new classes of non-Boolean facets of such a polytope. In Sections 5 and 6 we describe some non-sequential lifting procedures. In Section 7 a generalization of the notion ofweb introduced by L.E. Trotter is presented together with the facets of the covering polytope produced by such a structure. Moreover, the strong connections between several combinatorial problems and the covering problem are pointed out and, exploiting those connections, some examples are presented of new facets for the Knapsack and Acyclic Subdigraph polytopes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01589100
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  • 9
    Electronic Resource
    Electronic Resource
    Resonant structure of the outer Solar System (1985)
    Springer
    Celestial mechanics and dynamical astronomy 35 (1985), S. 269-287 
    Details
    ISSN: 1572-9478
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Hierarchical stability of the outer Solar System is monitored through its 3-body subsystems by using numerically computed ephemerides for 5×106 yr. It is found that the stability parameters of Sun-Jupiter-Saturn and Sun-Uranus-Neptune oscillate in anti-phase in ∼1.1×106 yr. The mechanism responsible for this locking is a secular resonance between Uranus' perihelion and Jupiter's aphelion: the difference between the two librates within ∼±70° with the same period of ∼1.1×106 yr.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01227657
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  • 10
    Electronic Resource
    Electronic Resource
    Instability of the 2+2 body problem (1987)
    Springer
    Celestial mechanics and dynamical astronomy 41 (1987), S. 153-160 
    Details
    ISSN: 1572-9478
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The equations of motion of the 2+2 body problem (two interacting particles in the gravitational field of two much more massive primaries m1 and m2 in circular keplerian orbit) have an integral analogous to the Jacobi integral of the circular 2+1 body problem. We show here that with 2+2 bodies this integral does not give rise to Hill stability, i.e. to confinement for all time in a portion of the configuration space not allowing for some close approaches to occur. This is because all the level manifolds are connected and all exchanges of bodies between the regions surroundingm 1,m 2 and infinity do not contradict the conservation of the integral. However, it is worth stressing that some of these exchanges are physically meaningless, because they involve either unlimited extraction of potential energy from the binary formed by the small bodies (without taking into account their physical size) or significant mutual perturbations between the small masses without close approach, a process requiring, for the Sun-Jupiter-two asteroids system, timescales longer than the age of the Solar System.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01238759
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