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  • 1
    Electronic Resource
    Electronic Resource
    Interfacial dynamics and formation of porous structures (1993)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 73 (1993), S. 4324-4331 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A computer simulation study of a two-dimensional two-component resistor network model is presented. The model is constructed to elucidate the relationship between interfacial dynamics and formation of porous structures. The interfacial dynamics, which are stochastic in nature, have been studied and the effect of both global and regional characteristics in interfacial dynamics on the resulting morphologies has been investigated. In the simulation, the advancing interface exhibits either an unstable front as dictated by the Mullins–Sekerka instability, or a stable one that is roughened by kinetic noise. The relevance of the simulation to the experimental observations of porous silicon formation is demonstrated and the implications are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.352816
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  • 2
    Electronic Resource
    Electronic Resource
    The realizations of quantum groups of An−1 and Cn types in q-deformed oscillator systems at classical and quantum levels (1991)
    College Park, Md. : American Institute of Physics (AIP)
    Journal of Mathematical Physics 32 (1991), S. 3241-3245 
    Details
    ISSN: 1089-7658
    Source: AIP Digital Archive
    Topics: Mathematics , Physics
    Notes: In the classical q-deformed oscillators system, the Poisson bracket realizations of the quantum enveloping algebras of An−1 and Cn types are given in the symplectic space (V,Ω) (without deformation). When the oscillators system is canonically quantized, the Lie bracket realizations of the quantum enveloping algebras of An−1 and Cn types are obtained. The Hopf structures of these quantum enveloping algebras are supplied.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.529484
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  • 3
    Electronic Resource
    Electronic Resource
    RHEOLOGICAL, MELTING AND MICROSTRUCTURAL PROPERTIES OF CHEDDAR AND MOZZARELLA CHEESES AFFECTED BY DIFFERENT FREEZING METHODS (2004)
    Oxford, UK and Malden, USA : Blackwell Science Inc
    Journal of food quality 27 (2004), S. 0 
    Details
    ISSN: 1745-4557
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Three cheeses were treated by (1) blast, (2) precooling plus blast, (3) liquid nitrogen and (4) precooling plus liquid nitrogen freezing methods. Mozzarella I and Cheddar cheeses treated by all methods had lower shear strength than their controls, excepting Mozzarella I treated by (1) was similar to its control. Mozzarella II treated by (1) and (2) had higher shear strength than its control but by (3) and (4) it had less. The failure stresses of Cheddar and Mozzarella I cheeses treated by (1) and (2) were significantly lower than their controls, while treated Mozzarella II had opposite results. Mozzarella I treated by (2) had meltability similar to its control and by (1) had lower meltability. Mozzarella II meltability was significantly reduced by (1) and (2). Stretchability was greatly improved using both methods for Mozzarella I but not for Mozzarella II. Cryo-stage Scanning Electron Microscopy (SEM) showed that the microstructural differences caused by (1) and (2) were apparent in Cheddar and Mozzarella II but not in Mozzarella I.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1745-4557.2004.00685.x
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  • 4
    Electronic Resource
    Electronic Resource
    ATTRITION EVALUATION FOR SELECTED AGGLOMERATED FOOD POWDERS: THE EFFECT OF AGGLOMERATE SIZE AND WATER ACTIVITY (2001)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food process engineering 24 (2001), S. 0 
    Details
    ISSN: 1745-4530
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Investigation of the attrition of agglomerates is very important for assessing the agglomerate strength, compaction characteristics, and quality control. A one-term exponential attrition index model and the Hausner ratio were used to study the effects of agglomerate size and water activity on the attrition kinetics of some selected agglomerated food powders. It was found that the agglomerate size and water activity played significant roles in affecting the attrition: the larger the agglomerate size and the higher the water activity, the higher the attrition index under the same tap number. The Hausner ratio was well correlated with the attrition index at high tap numbers and might be used as a simple index to evaluate attrition severity for agglomerates. Knowing the effects of agglomerate size and water activity is very useful to minimize the attrition phenomenon during the handling and processing of agglomerated powders.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1745-4530.2001.tb00530.x
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  • 5
    Electronic Resource
    Electronic Resource
    The Mg-chelatase H subunit is an abscisic acid receptor (2006)
    [s.l.] : Nature Publishing Group
    Nature 443 (2006), S. 823-826 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Abscisic acid (ABA) is a vital phytohormone that regulates mainly stomatal aperture and seed development, but ABA receptors involved in these processes have yet to be determined. We previously identified from broad bean an ABA-binding protein (ABAR) potentially involved in stomatal signalling, the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/nature05176
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  • 6
    Electronic Resource
    Electronic Resource
    Tight representation of logical constraints as cardinality rules (1999)
    Springer
    Mathematical programming 85 (1999), S. 363-377 
    Details
    ISSN: 1436-4646
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mathematics
    Notes: 1 ,...,Am are true, then at least ℓ of the propositions B1,...,Bn are true. The main result of the paper is that the procedure in fact provides a convex hull description.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s101070050061
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  • 7
    Electronic Resource
    Electronic Resource
    Constitutive Model of Thixotropic Plastic Forming for Semi-Solid AZ61 Magnesium Alloy (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Solid state phenomena Vol. 116-117 (Oct. 2006), p. 639-642 
    Details
    ISSN: 1662-9779
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Physics
    Notes: Uniaxial compression tests on semi-solid AZ61 alloy fabricated by stain-inducedactivation (SIMA) process and the conventional casts were carried out using the Gleedle-1500dynamic material testing machine. The relationships between stress and stain were analyzed. Thenumerical relationships among processing parameters (strain rate z ε& [removed info]strain z ε [removed info]temperature T[removed info]liquid volume fraction L f ) and stress were studied. The proposed constitutive equation wasestablished for semi-solid AZ61 magnesium alloy using the multiple nonlinear regression method. Ascientific basic provided for both numerical simulation of processing process of semi- solid AZ61alloy and rational choice and control of processing parameters
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/22/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.116-117.639.pdf
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  • 8
    Electronic Resource
    Electronic Resource
    Microstructural Evolution of SiCp/AZ61 Composites during Partial Remelting (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Solid state phenomena Vol. 141-143 (July 2008), p. 545-549 
    Details
    ISSN: 1662-9779
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Physics
    Notes: The microstructural evolution of SiCp/AZ61 composites during partial remelting wasinvestigated. The results indicated that the suitable technological parameters of SiCp/AZ61composites were the reheating temperature of 595°C ~ 600°C and isothermal holding time of30min ~ 60min. The separation of microstructure of AZ61 matrix was faster than that of SiCp/AZ61composites during the initial stage. In the meantime, SiCp/AZ61composites hold high stabilityduring remelting process and a fine semi-solid thixoforming microstructure can be obtained withincreases in temperature and holding time. In addition, the samples of SiCp/AZ61composites weresusceptible to serious deformation and running out above 610°C
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/24/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.141-143.545.pdf
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  • 9
    Electronic Resource
    Electronic Resource
    Study on Thixo-Forging of AZ61 Wrought Magnesium Alloy (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Solid state phenomena Vol. 141-143 (July 2008), p. 677-682 
    Details
    ISSN: 1662-9779
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Physics
    Notes: The semi-solid AZ61 wrought magnesium alloy was fabricated by mechanical stirringmethod. Thixo-forging set-up were designed and made. The traditional forging and thixo-forgingprocesses of AZ61 magnesium alloy were studied with both computer numerical simulation andexperimental methods. The constitutive model of semi-solid AZ61 alloy was established in our priorliterature. The differences between traditional forging and thixo-forging processes were analyzed.Results indicated that smaller load and uniform strain & stress were acquired in thixo-extrusionprocess. Simulation results were good agreement with experimental ones
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/24/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.141-143.677.pdf
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  • 10
    Electronic Resource
    Electronic Resource
    Auditory sensitivity of the cichlid fish Astronotus ocellatus (Cuvier) (1992)
    Springer
    Journal of comparative physiology 171 (1992), S. 105-109 
    Details
    ISSN: 1432-1351
    Keywords: Astronotus ocellatus ; Audiogram ; Acoustic ; sensitivity ; Fish ear ; Non-otophysan fish
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Auditory sensitivity was determined for the oscar, Astronotus ocellatus, a cichlid fish that has no known structural specializations to enhance hearing. Trained A. ocellatus behaviorally responded to sound stimuli from 200 Hz to 800 Hz with best sensitivity of 18 dB (re: 1 μbar) to 21 dB for frequencies between 200 and 400 Hz. This is significantly poorer than hearing sensitivity for fish classified as hearing specialists, but well within the range of hearing capabilities reported for non-specialist teleost species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00195965
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