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  • 1
    Electronic Resource
    Electronic Resource
    High-density recording performance of media with CoCrPtTa/Cr/NiP on glass ceramic substrate : The 41st annual conference on magnetism and magnetic materials (1997)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 81 (1997), S. 3946-3948 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The comparison of magnetic recording performance at high density between two kinds of CoCrPtTa/Cr/NiP thin films, one with Co(112¯0)//Cr(200) and another with Co(101¯1)//Cr(110) texture, on glass ceramic substrate is reported. The testing results have shown that the former films have lower transition noise, smaller partial erasure effect, and better offtrack capability in partial response maximum likelihood channel which also enhances the estimated areal density. The better performance of the films with Co(112¯0)//Cr(200) texture may be attributed to microstructure of Cr underlayer which results in bicrystal structure of magnetic layer and smaller Cr grain size. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.365080
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  • 2
    Electronic Resource
    Electronic Resource
    Entropy of Spin Fields in Schwarzschild Spacetime (2000)
    Springer
    International journal of theoretical physics 39 (2000), S. 253-257 
    Details
    ISSN: 1572-9575
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract By using the Teukolsky master equation, we consider the gravitational,electromagnetic, and neutrino fields in Schwarzschild spacetime. The free energyand entropy of the spin fields are obtained in terms of the brick-wall model. Itis shown that the entropy of all the spin fields due to the presence of the eventhorizon is proportional to the surface area of the event horizon, and the entropyof the neutrino field is the absolute minimum.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1003623906932
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  • 3
    Electronic Resource
    Electronic Resource
    New Quantum Effect for Vaidya-Bonner-de Sitter Black Holes (1999)
    Springer
    International journal of theoretical physics 38 (1999), S. 925-931 
    Details
    ISSN: 1572-9575
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The field equations of spin s = 0, 1/2, 1, and2 in the Vaidya–Bonner–de Sitter space-timeare investigated. The results show that the radiativemechanism of massive spin fields depends on the spinstate. We have sufficient reasons to conjecture thatthe effect originates from the quantumergosphere.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1026621405692
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  • 4
    Electronic Resource
    Electronic Resource
    From finite elasticity to linearized theory (1982)
    Springer
    Archive of applied mechanics 52 (1982), S. 121-129 
    Details
    ISSN: 1432-0681
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Übersicht In der Arbeit wird eine neue Herleitung der linearen Theorie der Elastizität aus den exakten Gleichungen der endlichen Elastizität gezeigt. Eine Hypothese, die geometrisch direkter ist als die Hypothese eines „kleinen Verschiebungsgradienten”, wird vorgeschlagen.
    Notes: Summary The subject of this paper is to study the derivation of the linear elasticity theory from the exact equations of finite elasticity. A hypothesis geometrically more direct than the hypothesis of “small displacement gradient” has been proposed. The derivation method is different from those that exist.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00536320
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  • 5
    Electronic Resource
    Electronic Resource
    In-vitro morphogenesis of corn (Zea mays L.) (1992)
    Springer
    Planta 187 (1992), S. 490-497 
    Details
    ISSN: 1432-2048
    Keywords: Shoot clumps ; Somatic embryogenesis ; Zea (organ interconversion in vitro) ; In-vitro organ formation ; Flowering in expiants
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The objective of this research was to study the in-vitro morphogenetic pattern of corn (Zea mays L.) shoot tips excised from aseptically-grown seedlings, and of expiants of axillary shoot buds, immature tassels and ears (staminate and pistillate inflorescences) obtained from greenhouse-grown corn plants. The seedling shoot tips and immature ears first regenerated clumps of multiple shoots within four weeks of culture on Murashige and Skoog (MS) basal medium supplemented with 500 mg/L casein hydrolysate (CH) and 9.0 μM N6-benzyladenine (BA). Multiple shoot clumps were also differentiated from spikelets of immature tassels cultured on MS medium containing 500 mg/L CH, 4.5 μM BA and 0.45 μM 2,4-dichlorophenoxy acetic acid (2,4-D). All these multiple shoot clumps in turn differentiated clusters of ears after further four subcultures at four-week intervals under light on MS medium supplemented with 500 mg/L CH and 2.25, 4.5, 9.0 or 18 μM BA. Axillary shoot buds readily differentiated clusters of ears within four weeks of the initial culture on these media. Secondary and tertiary ear clusters were initiated following subculture of primary ears on MS medium containing 500 mg/L CH and 4.5 or 9.0 μM BA. Most of the ear primordia developed into ears with well-developed ovaries and styles on subculture on MS medium containing 500 mg/L CH and 1.0 μM BA. Corn kernels were obtained after pollination of in-vitro-formed ears with pollens collected from greenhouse-grown corn. These kernels germinated in vitro and developed into mature corn plants in the greenhouse. Clusters of tassels were also differentiated in darkness from the multiple shoot clumps after six months successive subcultures but the spikelet primordia of tassels failed to develop fully under the in-vitro conditions tested. Somatic embryos arose directly from spikelet primordia of young tassels or ears on MS medium containing 500 mg/L CH and 4.5 μM 2,4-D, or indirectly from calli derived from spikelets of young tassels and ears on MS medium containing 500 mg/L CH and 9.0 μM 2.4-D.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00199967
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  • 6
    Electronic Resource
    Electronic Resource
    Transgenic plants of turfgrass (Agrostis palustris Huds.) from microprojectile bombardment of embryogenic callus (1993)
    Springer
    Plant cell reports 13 (1993), S. 1-6 
    Details
    ISSN: 1432-203X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Transgenic creeping bentgrass (Agrostis palustris Huds., cv. Pencross; Poaceae) plants have been obtained by microprojectile bombardment of and regeneration from embryogenic calli with a vector designed to deliver the β-glucuronidase (GUS) gene under the control of rice actin 1 5' regulatory sequences. Southern analysis of polymerase chain reaction (PCR)-amplified and restriction-digested genomic DNA of four transgenic plants regenerated from these cultures showed the unscrambled integration of the gus fragment. Northern blot analysis confirmed the expression of gus mRNA in one of the transgenic plants. Western blot analysis revealed a high level of accumulation of gus protein. Histochemical assays showed enzymatic activity of β-glucuronidase in all parts of the transgenic turfgrass plant. The order of gus expression level in different tissues of the transgenic plant is as follows: stem node 〉 first young leaf 〉 root tip 〉 second / third / fourth young leaf 〉 stem internode 〉 root hair-zone.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00232305
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  • 7
    Electronic Resource
    Electronic Resource
    Plant regeneration via somatic embryogenesis in creeping bentgrass (Agrostis palustris Huds.) (1991)
    Springer
    Plant cell reports 10 (1991), S. 453-456 
    Details
    ISSN: 1432-203X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract We have established a high-frequency plant regeneration system via somatic embryogenesis from mature seeds of creeping bentgrass (Agrostis palustris Huds). The effects of 2,4-dichlorophenoxyacetic acid (2,4-D), 3.6-dichloroo-anisic acid (dicamba) and 6-benzyladenine (BA) on callus formation and embryogenesis were evaluated. Callus produced on the Murashige and Skoog (MS) (1962) medium containing 2,4-D had low embryogenic potency. In the presence of 30 μM dicamba, addition of 2.25 to 9 μM BA significantly enhanced embryogenic callus formation over dicamba alone. Optimum frequency of somatic embryogenesis was achieved on MS basal medium containing 30 μM dicamba and 2.25 μM BA. Over 80% of somatic embryos germinated and formed plantlets on half-strength MS basal medium. These plantlets grew normally in the greenhouse.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00233813
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  • 8
    Electronic Resource
    Electronic Resource
    In-vitro morphogenesis of corn (Zea mays L.) (1992)
    Springer
    Planta 187 (1992), S. 483-489 
    Details
    ISSN: 1432-2048
    Keywords: Shoot clump ; Shoot meristem ; Shoot organogenesis ; Somatic embryogenesis in vitro ; Zea(shoot and embryo formation in vitro)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract In-vitro methods have been developed to regenerate clumps of multiple shoots and somatic embryos at high frequency from shoot tips of aseptically-grown seedlings as well as from shoot apices of precociously-germinated immature zygotic embryos of corn (Zea mays L.). About 500 shoots were produced from a shoot tip after eight weeks of culture (primary culture and one subculture of four weeks) in darkness on Murashige and Skoog basal medium (MS) supplemented with 500 mg/L casein hydrolysate (CH) and 9 μM N6-benzyladenine (BA). In this medium, shoots formed in shoot tips as tightly packed “multiple shoot clumps” (MSC), which were composed of some axillary shoots and many adventitious shoots. When the shoot tips were cultured on MS medium containing 500 mg/L CH, 9 μM BA and 2.25 μM 2,4-dichlorophenoxyacetic acid (2,4-D), most of the shoots in the clumps were adventitious in origin. Similar shoot tips cultured on MS medium containing 500 mg/L CH, 4.5 μM BA and 2.25 μM 2,4-D regenerated many somatic embryos within eight weeks of culture. Somatic embryos were produced either directly from the shoot apical meristems or from calli derived from the shoots apices. Both the MSC and the embryos produced normal shoots on MS medium containing 2.25 μM BA and 1.8 μM indole-3-butyric acid (IBA). These shoots were rooted on MS medium containing 3.6 μM IBA, and fertile corn plants were grown in the greenhouse. The sweet-corn genotype, Honey N Pearl, was used for the experiments described above, but shoot-tip cultures from all of 19 other corn genotypes tested also formed MSC on MS medium containing 500 mg/L CH and 9 μM BA.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00199966
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  • 9
    Electronic Resource
    Electronic Resource
    Unified theory of variation principles in non-linear theory of elasticity (1980)
    Springer
    Applied mathematics and mechanics 1 (1980), S. 1-22 
    Details
    ISSN: 1573-2754
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Mathematics , Physics
    Notes: Abstract The purpose of this paper is to introduce and to discuss several main variation principles in nonlinear theory of elasticity — namely the classic potential energy principle, complementary energy principle, and other two complementary energy principles (Levinson principle and Fraeijs de Veubeke principle) which are widely discussed in recent literatures. At the same time, the generalized variational principles are given also for all these principles. In this paper, systematic derivation and rigorous proof are given to these variational principles on the unified bases of principle of virtual work, and the intrinsic relations between these principles are also indicated. It is shown that, these principles have unified bases, and their differences are solely due to the adoption of different variables and Legendre tarnsformation. Thus, various variational principles constitute an organized totality in an unified frame. For those variational principles not discussed in this paper, the same frame can also be used, a diagram is given to illustrate the interrelationships between these principles.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01872624
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  • 10
    Electronic Resource
    Electronic Resource
    Lagrange equation of a class of nonholonomic systems (1991)
    Springer
    Applied mathematics and mechanics 12 (1991), S. 421-424 
    Details
    ISSN: 1573-2754
    Keywords: nonholonomic dynamics ; d-δ commutativity ; Appell-Chetaev condition
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Mathematics , Physics
    Notes: Abstract Making use of conclusions from [1]: (1) d-δ operations are commutative; (2) the Appell-Chetaev condition restricting virtual displacements is superfluous, the present paper derives the Lagrange equation without multipliers for a class of first-order nonlinear nonholonomic dynamical systems by means of variational principle. This kind of equations is new.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02019585
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