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  • Springer  (203)
  • American Association of Petroleum Geologists  (15)
  • 1995-1999  (192)
  • 1965-1969  (26)
  • 1
    Electronic Resource
    Electronic Resource
    A necessary condition for Calderón-Zygmund singular integral operators (1999)
    Springer
    The journal of Fourier analysis and applications 5 (1999), S. 303-308 
    Details
    ISSN: 1531-5851
    Keywords: 42B20 ; 42B30 ; Hardy spaces ; Calderon-Zygmund singular integral operator ; multipliers
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract Calderón-Zygmund singular integral operators have been extensively studied for almost half a century. This paper provides a context for and proof of the following result: If a Calderón-Zygmund convolution singular integral operator is bounded on the Hardy space H1 (Rn), then the homogeneous of degree zero kernel is in the Hardy space H1(Sn−1) on the sphere.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01259372
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  • 2
    Electronic Resource
    Electronic Resource
    On bilevel programming, Part I: General nonlinear cases (1995)
    Springer
    Mathematical programming 70 (1995), S. 47-72 
    Details
    ISSN: 1436-4646
    Keywords: Bilevel programming ; Nonlinear nonconvex ; Nondifferentiable optimization ; Economic planning ; Sensitivity analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mathematics
    Notes: Abstract This paper is concerned with general nonlinear nonconvex bilevel programming problems (BLPP). We derive necessary and sufficient conditions at a local solution and investigate the stability and sensitivity analysis at a local solution in the BLPP. We then explore an approach in which a bundle method is used in the upper-level problem with subgradient information from the lower-level problem. Two algorithms are proposed to solve the general nonlinear BLPP and are shown to converge to regular points of the BLPP under appropriate conditions. The theoretical analysis conducted in this paper seems to indicate that a sensitivity-based approach is rather promising for solving general nonlinear BLPP.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01585928
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  • 3
    Electronic Resource
    Electronic Resource
    Mechanical properties of a poly(methyl acrylate) nanocomposite containing regularly-arranged silica particles (1996)
    Springer
    Polymer bulletin 37 (1996), S. 545-551 
    Details
    ISSN: 1436-2449
    Keywords: Nanocomposites ; poly(methyl acrylate) ; elastomers ; silica ; mechanical properties ; reinforcement ; organic-inorganic hybrid materials
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary In an earlier investigation, poly(methyl acrylate) nanocomposites containing silica particles were found to have novel optical properties when the particles were regularly spaced rather than randomly located. The availability of these materials was used to determine whether there was any difference in the particles' reinforcing ability between ordered and random arrangements. The two types of composites were compared using near-equilibrium mechanical property measurements in uniaxial or equi-biaxial deformation, and dynamic mechanical properties measurements. It was found that having the filler particles regularly arranged had little effect on these properties, and that there was no anisotropy in their mechanical behavior. Related experiments could possibly be used to clarify the long-standing question of the importance of particle aggregation in elastomer reinforcement.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00556818
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  • 4
    Electronic Resource
    Electronic Resource
    Thermally Induced Failure of Low-Voltage Electrical Nonmetallic-Sheathed Cable Insulation (1999)
    Springer
    Fire technology 35 (1999), S. 263-275 
    Details
    ISSN: 1572-8099
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying
    Notes: Abstract Nonmetallic sheathed cable assemblies are commonplace throughout the electrical construction industry. The maximum current and ambient temperatures to which these cables can be exposed are listed in NFPA 70, National Electrical Code® (NEC)®. Laboratory test data presented here show the effects of exceeding these limits. Properties of the insulation materials in a standard cable assembly are evaluated using simultaneous thermal analysis (thermal gravimetric analysis (TGA) and differential scanning calorimetry (DSC)) coupled with Fourier transform infrared spectroscopy (STA/FTIR). Cable temperature under actual-use conditions is presented as a function of load current. Insulation resistance measurements of heated cable are included.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1015488527269
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  • 5
    Electronic Resource
    Electronic Resource
    A formal approach to reactive systems software: A telecommunications application in Esterel (1996)
    Springer
    Formal methods in system design 8 (1996), S. 123-151 
    Details
    ISSN: 1572-8102
    Keywords: Reactive systems ; Esterel ; synchronous programming ; formal methods ; software verification ; telecommunications
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Notes: Abstract Esterel is a formally-defined language designed for programming reactive systems; namely, those that maintain a permanent interaction with their environment. The AT&T 5ESS® telephone switching system is an example of a reactive system. We describe an implementation in Esterel of one feature of a 5ESS switch; this implementation has been tested in the 5ESS switch simulator. Furthermore, it has been formally verified that this implementation satisfies some safety properties stated by 5ESS software development. Our experience indicates that Esterel is suitable for programming industrial-strength reactive systems, and affords significant advantages in software development over more traditional programming languages used in industrial settings.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00122418
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  • 6
    Electronic Resource
    Electronic Resource
    Behavioral responses of the smaller European elm bark beetle, Scolytus multistriatus, to extracts of non-host tree tissues (1968)
    Springer
    Entomologia experimentalis et applicata 11 (1968), S. 464-469 
    Details
    ISSN: 1570-7458
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Zusammenfassung Benzol-Rohextrakte von 6 Nicht-Wirtsbäumen riefen allein bei erwachsenen Scolytus multistriatus (Marsh.) keine Fraßreaktionen hervor. Wurden sie zu gleichen Teilen mit einem stimulierenden Extrakt von Ulmus americanus L. kombiniert, so setzten alle Rohextrakte aus Nicht-Wirten die Fraßmenge herab, die sonst auftritt. Wenigstens zwei der Nicht-Wirte (Populus deltoides Bartr. und Aesculus octandra Marsh.) enthielten auf kurze Entfernung wirkende positive Reize, aber ihr Einfluß auf eine positive Reaktion des Insekts wurde bei den meisten Behandlungen durch Verbindung mit abweisenden (deterrent) Stoffen verhindert. So spielen bei der Auslösung der Ablehnung von Rohextrakten der Nicht-Wirte durch die Käfer Deterrent- und Repellent-Reize die Hauptrolle.
    Notes: Abstract Crude benzene extracts of 6 non-host trees alone did not stimulate feeding responses by adults of Scolytus multistriatus (Marsh.). When combined equally with a stimulatory extract from Ulmus americana L., all of the crude non-host extracts reduced the amount of feeding which otherwise occurred. At least two of the non-hosts (Populus deltoides Bartr. and Aesculus octandra Marsh) contained positive short-range orientational stimuli, but their induction of a positive response by the insect was prevented in most treatments by associated deterrent chemicals. Thus, stimuli (deterrents and repellents) played the dominant role in eliciting the rejection of crude non-host extracts by the beetles.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00364577
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  • 7
    Electronic Resource
    Electronic Resource
    Onion fly,Delia antiqua, oviposition and mating as influenced by insect age and dosage of male reproductive tract extract (Diptera: Anthomyiidae) (1995)
    Springer
    Journal of insect behavior 8 (1995), S. 617-635 
    Details
    ISSN: 1572-8889
    Keywords: sex peptide ; oviposition ; mating ; mating inhibition ; paragonial (accessory) glands ; individual variation ; monogamy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract One hundred percent of virgin female onion flies,Delia antiqua, receiving ≥1/20 of a male equivalent of an aqueous extract of mature male reproductive tract remained unmated in the presence of males and began laying unfertilized eggs at a normally mated rate of about 20 eggs/female/day. The 50% behavioral response (BR50) fell between 1/40 and 1/20 of a male equivalent. Sex peptide responses are not always all-or-none. Some females receiving extract at ≤1/40 male equivalent oviposited at an intermediate rate. Moreover, at low sex peptide dosages, some females were fully activated ovipositionally but were receiptive to mating. A low level of sex peptide was present in 1-day-old males. Sex peptide titer rose with age until plateauing by 6 days posteclosion. Males began mating at 3 days, when they first had ample mature sperm; 50% of 6-day-old males mated. The mean number of females inseminated per male exposed to an excess of virgin females over 24 h was 4.3±0.6 (±SE). Presence of mature eggs was not always a prerequisite for mating, although probability of insemination was correlated with egg maturation. One-day-old preovipositional females receiving 1/20 of a male equivalent of extract began ovipositing when they had mature eggs at 5–6 days old. Therefore, sex peptide may act early and permanently or have a long half-life and affect behaviors once females reach sexual maturity. Male flies provide females with an excess of sex peptide in many cases.D. antiqua males transferred ca. 5–10 times more sex peptide than necessary to activate females fully. We suggest this excess is related to the speed of female response. It is yet unclear whether sex peptide potency or titer in Diptera has become exaggerated by intra- or intersexual selection.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01997234
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  • 8
    Electronic Resource
    Electronic Resource
    Stability of relative equilibria in arbitrary axisymmetric gravitational and magnetic fields (1999)
    Springer
    Celestial mechanics and dynamical astronomy 74 (1999), S. 19-57 
    Details
    ISSN: 1572-9478
    Keywords: stability ; Hamiltonian ; two centers ; oblate planet ; galactic disks ; dipole
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Relative equilibria occur in a wide variety of physical applications, including celestial mechanics, particle accelerators, plasma physics, and atomic physics. We derive sufficient conditions for Lyapunov stability of circular orbits in arbitrary axisymmetric gravitational (electrostatic) and magnetic fields, including the effects of local mass (charge) and current density. Particularly simple stability conditions are derived for source‐free regions, where the gravitational field is harmonic (∇2U = 0) or the magnetic field irrotational (∇ × B = 0). In either case the resulting stability conditions can be expressed geometrically (coordinate‐free) in terms of dimensionless stability indices. Stability bounds are calculated for several examples, including the problem of two fixed centers, the J2 planetary model, galactic disks, and a toroidal quadrupole magnetic field.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008388105585
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  • 9
    Electronic Resource
    Electronic Resource
    An analysis of staffing efficiency in U.S. manufacturing: 1983 and 1989 (1997)
    Springer
    Annals of operations research 73 (1997), S. 67-89 
    Details
    ISSN: 1572-9338
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Economics
    Notes: Abstract A DEA framework is used to examine changes in administrative employment in U.S. manufacturing industries between 1983 and 1989, using data collected by the U.S. Department of Labor. Among other findings, the analysis suggests that production technology is an important factor in explaining inter-industry differences in administrative staffing. In addition, "best practice" staffing efficiencies for Batch industries are shown to hold a distinct (and statistically significant) advantage over that for Line industries. On related issues, this research uncovers no evidence of the "dramatic decreases" in overhead staffing that were suggested in the popular business press during this time period. Clear structural differences in administrative staffing intensities, however, are noted with respect to manufacturing production technology. In their usage of overhead staff, Batch industries tend to be more "professional-worker" intensive, while Line industries are relatively more "non-professional-worker" intensive. These patterns hold up over time and are statistically con-firmed in an analysis of DEA "cones".
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1018901916907
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  • 10
    Electronic Resource
    Electronic Resource
    Thermochemistry of Binding of Lead(II) and Cadmium(II) by Saccharides in Aqueous Solution (1999)
    Springer
    Journal of solution chemistry 28 (1999), S. 1019-1030 
    Details
    ISSN: 1572-8927
    Keywords: Thermodynamic parameters ; aqueous solution ; saccharide ; metal cation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Solution calorimetry was used to determine enthalpies and stability constants for binding of lead(II) or cadmium(II) by galacturonic acid and several monosaccharides in aqueous solution. New values for enthalpies of solution in water are reported for galacturonic acid and maltose monohydrate. The interaction of water solvent with the reactants is the largest factor in the binding process.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1022614111327
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