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  • Springer  (1,531)
  • Institute of Physics  (594)
  • Copernicus  (78)
  • 1
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    Measurements of the Higgs boson production and decay rates and constraints on its couplings from a combined ATLAS and CMS analysis of the LHC pp collision data at s = 7 $$ sqrt{s}=7 $$ and 8 TeV (2016)
    Springer
    Details
    Publication Date: 2016-08-01
    Print ISSN: 1126-6708
    Electronic ISSN: 1029-8479
    Topics: Physics
    Published by Springer
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    PAPER CURRENT
  • 2
    Electronic Resource
    Electronic Resource
    A three-dimensional model of the upper tracheobronchial tree (1980)
    Springer
    Bulletin of mathematical biology 42 (1980), S. 847-859 
    Details
    ISSN: 1522-9602
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Mathematics
    Notes: Abstract A new model of the upper tracheobronchial tree is proposed to account for the three-dimensional nature of the airway system. In addition to the tube length, the tube diameter, and the branching angle, the model includes information on the orientation angle of each tube relative to its parent tube. The orientation angle, defined as the angle between two successive bifurcations, is useful for calculating the gravitational inclination of each tube. The information on orientation angle is further used to construct a binary coding system for identifying individual tubes in the airway tree. The proposed model is asymmetrical, but the same principles can be readily used to construct a symmetrical one.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02461063
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  • 3
    Electronic Resource
    Electronic Resource
    Higher-order approximation techniques for estimating stochastic parameter of a sediment transport model (1998)
    Springer
    Stochastic environmental research and risk assessment 12 (1998), S. 359-375 
    Details
    ISSN: 1436-3259
    Keywords: Key words: Non-homogeneous Poisson model ; parameter estimation ; approximation technique ; Taylor series ; cumulative probability distribution function ; intensity function ; error analysis.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying , Energy, Environment Protection, Nuclear Power Engineering , Geography , Geosciences
    Notes: Abstract: Higher-order approximation techniques for estimating stochastic parameter of the non-homogeneous Poisson (NHP) model are presented. The NHP model is characterized by a two-parameter cumulative probability distribution function (CDF) of sediment displacement. Those two parameters are the temporal and spatial intensity functions, physically representing the inverse of the average rest period and step length of sediment particles, respectively. Difficulty of estimating the parameters has, however, restricted the applications of the NHP model. The approximation techniques are proposed to address such problem. The basic idea of the method is to approximate a model involving stochastic parameters by Taylor series expansion. The expansion preserves certain higher-order terms of interest. Using the experimental (laboratory or field) data, one can determine the model parameters through a system of equations that are simplified by the approximation technique. The parameters so determined are used to predict the cumulative distribution of sediment displacement. The second-order approximation leads to a significant reduction of the CDF error (of the order of 47%) compared to the first-order approximation. Error analysis is performed to evaluate the accuracy of the first- and second-order approximations with respect to the experimental data. The higher-order approximations provide better estimations of the sediment transport and deposition that are critical factors for such environment as spawning gravel-bed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004770050025
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  • 4
    Electronic Resource
    Electronic Resource
    High performance complex-coupled 1.55 μm distributed feedback lasers for digital transmission (1996)
    Springer
    Optical and quantum electronics 28 (1996), S. 1343-1350 
    Details
    ISSN: 1572-817X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract We report low threshold and high speed 1.55 μm complex-coupled distributed feedback (CCDFB) lasers with gain coupling induced by a current blocking grating. Excellent device performance has been demonstrated with a record-low threshold of 5.6 mA, a large modulation bandwidth of 11 GHz and useful high temperature operation up to 95°C.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00326207
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  • 5
    Electronic Resource
    Electronic Resource
    A study of the dark currents of InSb charge injection devices (1996)
    Springer
    Optical and quantum electronics 28 (1996), S. 1287-1294 
    Details
    ISSN: 1572-817X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract The dark currents of InSb metal-insulator-semiconductor (MIS) charge injection devices (CIDs) in the temperature range 30 to 120K are studied. It is found that a thermal-generating process dominates the dark current in the high temperature region. When the device is under small bias voltage, a bump in the trap emission current appears below 70K. This current is due to carrier capture and emission processes of a hole trap state located in the bulk material, and the measured activation energy is 50meV. For larger bias conditions, the band-to-band tunnelling current gradually overcomes the trap emission current. It smears out the bump in the trap emission current, and shows a slightly temperature-dependent behaviour in the plot. The effects of field electrodes are also studied. It is found from experimental results that the edge of the electric field around the device periphery plays an important role in the band-to-band tunnelling process, and a field electrode with suitable bias can improve the dark current response drastically.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00326201
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  • 6
    Electronic Resource
    Electronic Resource
    Fatigue fracture behavior of chlor-alkali membranes (1994)
    Springer
    Journal of polymer research 1 (1994), S. 205-209 
    Details
    ISSN: 1572-8935
    Keywords: Chlor-alkali membrane ; Fatigue fracture behavior ; Fracture mechanics ; da/dN vs. ΔK
    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: Abstract The fatigue fracture behavior of chlor-alkali monolayer membranes is investigated under a condition similar to the membrane electrolysis cell service environment, i.e., at 86°C in brine solution. The linear elastic fracture mechanics (LEFM) approach, i.e., da/dN vs. AK, is implemented in this study. It is found that the fatigue crack propagation behavior of the chlor-alkali membranes can be successfully characterized via the LEFM technique. The fatigue fracture surfaces of the membranes are also investigated using stereo-optical microscopy and are found to show typical fatigue striation patterns. Detailed experimental procedures for preparing and testing of the membranes are presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01374096
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  • 7
    Electronic Resource
    Electronic Resource
    Codazzi Tensors and the Topology of Surfaces (1998)
    Springer
    Annals of global analysis and geometry 16 (1998), S. 189-202 
    Details
    ISSN: 1572-9060
    Keywords: Codazzi tensor ; index method ; topologyof surfaces
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract We introduce the notion of (0,m)-Codazzi tensors relative to an affine connection which extends the well known concept for m = 2. On compact Riemannian surfaces of genus γ we determine the dimension of the R-vector space of traceless Codazzi tensors, which depends on m and γ only, additionally we extend these result for genus zero. We give some exemplary applications to submanifolds in affine and in Riemannian geometry and to Weyl geometries.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006582620941
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  • 8
    Electronic Resource
    Electronic Resource
    Cubic Form Methods and Relative Tchebychev Hypersurfaces (1997)
    Springer
    Geometriae dedicata 66 (1997), S. 203-221 
    Details
    ISSN: 1572-9168
    Keywords: Tchebychev hypersurface ; relative geometry ; hyperovaloid ; cubic form.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract We introduce the concept of a relative Tchebychev hypersurface which extends that of affine spheres in equiaffine geometry and also that of centroaffine Tchebychev hypersurfaces and give partial local and global classifications for this new class. Our tools concern a new operator and interesting properties of the traceless part of the cubic form.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1004912032314
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  • 9
    Electronic Resource
    Electronic Resource
    A novel 16,24-dehydrobiladiene-ab system: The reaction of xanthobilirubic acid methyl ester with bromine (1995)
    Springer
    Monatshefte für Chemie 126 (1995), S. 201-209 
    Details
    ISSN: 1434-4475
    Keywords: 16,24-Dehydrobiladiene-ab ; Biladiene-ab ; Xanthobilirubic acid methyl ester ; Mesobilirubin-XIIIα ; Mesobiliverdin-XIIIα ; 14-Formyl-tripyrrinone ; 15,16-Dimethoxy-biladienes-ab
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Der Umsatz von Xanthobilirubinsäuremethylester mit Brom in Methanol ergibt in 20-prozentiger Ausbeute ein rotes Pigment, für das die bislang nicht bekannte 16,24-Dehydrobiladien-ab-Konstitution abgeleitet wurde. Darüber hinaus konnte das entsprechende Mesobiliverdin-XIIIα, Mesobilirubin-XIIIα, 14-Formyltripyrrinon, und zwei diastereomere 15,16-Dimethoxybiladiene-ab aus der Reaktionsmischung isoliert werden. Die mechanistischen Aspekte dieser Reaktion werden diskutiert.
    Notes: Summary On treating xanthobilirubic acid methyl ester with bromine in methanol, a red bile pigment, which was assigned the hitherto unknown 16,24-dehydrobiladiene-ab constitution, is obtained in 20% yield. In addition, the corresponding mesobiliverdin-XIIIα, mesobilirubin-XIIIα, 14-formyl-tripyrrinone, and two diastereomeric 15,16-dimethoxybiladienes-ab could be isolated from the reaction mixture. The mechanistic aspects of this reaction are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00812248
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  • 10
    Electronic Resource
    Electronic Resource
    1,2-bis-Dipyrrinon-9-yl-ethene — a novelb-homo-verdian chromophore: the reaction of 9-methyl-10H-dipyrrin-1-ones with bromine (1995)
    Springer
    Monatshefte für Chemie 126 (1995), S. 983-991 
    Details
    ISSN: 1434-4475
    Keywords: 1,2-bis-Dipyrrinon-9-yl-ethene ; b-homo-Verdin ; Mesobiliverdin-XIIIα
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Die Reaktion von 9-Methyl-10H-dipyrrin-1-onen mit Brom in Dichlormethan ergab in mäßigen Ausbeuten rotgefärbte Gallenfarbstoffderivate. Sie konnten strukturell als 1,2-bis-Dipyrrinon-ethene zugeordnet werden, die ein Beispiel für die bisher unbekanntenb-Homoverdine darstellen. Darüber hinaus konnten aus der Reaktionsmischung die entsprechenden Mesobiliverdine-XIIIα isoliert werden. Die mechanistischen Aspekte dieser Reaktion werden diskutiert.
    Notes: Summary Upon treatment of 9-methyl-10H-dipyrrin-1-ones with bromine in dichloromethane, red bile pigment derivatives were obtained in moderate yields. They were structurally assigned as 1,2-bis-dipyrrinon-9-yl-ethenes, which are examples of the hitherto unknownb-homo-verdins. In addition, the correspondingmeso-biliverdins-XIIIα could be isolated from the reaction mixture. The mechanistic aspects of the reaction are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00811018
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