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  • 1
    Electronic Resource
    Electronic Resource
    The coexistence of pressure waves in the operation of quartz-crystal shear-wave sensors (1998)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 83 (1998), S. 2524-2532 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: It is demonstrated that an AT-cut quartz crystal driven in the thickness-shear-wave mode and typically used as a sensor to monitor the viscoelastic shear-wave properties of a fluid also produce longitudinal pressure waves. Unlike the shear wave, these waves are capable of long-range propagation through the fluid and of reflection at its boundaries, notably at an outer fluid–air interface. They introduce a component into the measured electrical impedance and resonance frequency shift of the crystal, which reflects the setting up of cyclic pressure-wave resonances in the fluid. This has important implications for the practical employment of these crystal as sensors. Under appropriate conditions, as demonstrated for water and n-octane, it is possible to determine the propagating properties of sound waves in a fluid simultaneously with the viscoelastic shear-wave properties. These experiments are supported by an analysis of the appropriate hydrodynamic equations for waves in the crystal–fluid system, which predicts electrical characteristics in close agreement with those found experimentally. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.366990
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  • 2
    Electronic Resource
    Electronic Resource
    VORTEX MOTION IN LOW-SPEED AERODYNAMICS (1968)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 154 (1968), 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.1749-6632.1968.tb15228.x
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  • 3
    Electronic Resource
    Electronic Resource
    Interruption and evaporation effects for the reaction of atomic hydrogen with solid olefins at 77.deg.K (1968)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 72 (1968), S. 3689-3692 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100856a064
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  • 4
    Electronic Resource
    Electronic Resource
    Mechanism of Oxidative Amine Dealkylation of Substituted N,N-Dimethylanilines by Cytochrome P-450: Application of Isotope Effect Profiles (1995)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 117 (1995), S. 3657-3664 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00118a001
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  • 5
    Electronic Resource
    Electronic Resource
    On isotope effects for the cytochrome P-450 oxidation of substituted N,N-dimethylanilines (1993)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 115 (1993), S. 7111-7116 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00069a007
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  • 6
    Electronic Resource
    Electronic Resource
    Behavioural evidence for colour vision in stomatopod crustaceans (1996)
    Springer
    Journal of comparative physiology 179 (1996), S. 473-481 
    Details
    ISSN: 1432-1351
    Keywords: Stomatopod ; Colour vision ; Crustacean behaviour
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract If an organism can be taught to respond in a particular way to a wavelength of light, irrespective of that light's intensity, then it must be able to perceive the colour of the stimulus. No marine invertebrate has yet been shown to have colour vision. Stomatopod crustaceans (mantis shrimps) are colourful animals and their eyes have many adaptations which indicate that they are capable of such spectral analysis. We adopted an associative learning paradigm to attempt to demonstrate colour vision. Stomatopods readily learnt to choose some colours from arrays of greys, even when the correct choice colours were darker than the ones they had been trained to. Possible mechanisms underlying colour vision in these animals, and their ecological significance are discussed. A simple model is presented which may help interpret the complex-stomatopod colour vision system and explain some of the learning anomalies.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00192314
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  • 7
    Electronic Resource
    Electronic Resource
    Arrangement of Atoms in the First Monolayer of Nickel on Tungsten (1966)
    [s.l.] : Nature Publishing Group
    Nature 211 (1966), S. 479-481 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] AN investigation of the properties of adsorbed layers of copper on tungsten by field emission microscopy led to the suggestion that copper atoms in the first monolayer conformed exactly to the tungsten structure by taking up positions offered by the array of potential wells present at the tungsten ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/211479a0
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  • 8
    Electronic Resource
    Electronic Resource
    Some undecidable determined games (1982)
    Springer
    International journal of game theory 11 (1982), S. 63-70 
    Details
    ISSN: 1432-1270
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Economics
    Notes: Abstract Computing machines using algorithms play games and even learn to play games. However, the inherent finiteness properties of algorithms impose limitations on the game playing abilities of machines. M. Rabin illustrated this limitation in 1957 by constructing a two-person win-lose game with decidable rules but no computable winning strategies. Rabin's game was of the type where two players take turns choosing integers to satisfy some decidable but very complicated winning condition. In the present paper we obtain similar theorems of this type but the winning conditions are extremely simple relations (polynomial equations). Specific examples are given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01769063
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  • 9
    Electronic Resource
    Electronic Resource
    Computational complexity of winning strategies in two-person polynomial games (1994)
    Springer
    Journal of mathematical sciences 70 (1994), S. 1887-1889 
    Details
    ISSN: 1573-8795
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract One considers two-person games, with players called I and II below. In order, they choose natural numbers, for example, for length 4, I chooses x1, II chooses x2. I chooses x3, II chooses x4. Then I wins if P(x1,x2,x3,x4)=0.Here P is a polynomial with integer coefficients. An old theorem of von Neumann and Zermelo shows that such a game is determined, i.e., there exists a winning strategy for one player or the other but not necessarily a computable winning strategy or one computable in polynomial time. It will be shown that there exists a game of polynomial type of length 4 for which there do not exist winning strategies for either player which are computable in polynomial time.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02112429
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  • 10
    Electronic Resource
    Electronic Resource
    Phosphorus sorption isotherm for evaluating phosphorus requirements of lettuce at five temperature regimes (1977)
    Springer
    Plant and soil 46 (1977), S. 31-44 
    Details
    ISSN: 1573-5036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract A study was conducted to determine the influence of temperature on solubility and subsequent availability of P to plants. Phosphorus sorption curves were used to fertilize the soil with six P rates corresponding to initial sorption equilibrium solution P levels in the range of 0.03 to 0.72 ppm. Yield response to P measured for temperatures was in controlled environment chambers. Growth temperatures ranged 12.7°C to 29.4°C. Sorption of added P and desorption of sorbed P increased with increase in temperature. Yields of lettuce increased with the increased sorption equilibrium solution P levels at all the temperatures. Initial sorption-equilibrium solution P levels necessary for 95% yield had to be increased from 0.20 to 0.64 ppm when temperature was lowered from 29.4° C to 12.7°C. Desorption-equilibrium solution P levels for 95% yield were nearly constant at all temperatures. The log of initial sorption equilibrium solution P as a function of temperature for 95% yield was linear between 17.2°C and 29.4°C. Comparison of the data for 95% yield in solution cultures showed that critical nutrient solution P levels were very close to the desorption equilibrium P levels for 95% yield of plants grown in soil at similar temperatures. Relative yields of lettuce and desorption equilibrium solution P levels showed the same trend to changes in temperature. The study suggests that the major role of temperature on P uptake between 17.2°C and 29.4°C is due to desorption of P from the soil. Physiological influences of temperature on plant growth and consequent P requirement play a minor role.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00693112
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