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  • 1
    Electronic Resource
    Electronic Resource
    Polynomial ambiguity resistant precoders: Theory and applications in ISI/multipath cancellation (2000)
    Springer
    Circuits, systems and signal processing 19 (2000), S. 71-98 
    Details
    ISSN: 1531-5878
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Notes: Abstract In this paper, precoding techniques are studied for combating the intersymbol interference (ISI)/multipath effects in communication systems. We introduce a new type-precoder which we term thepolynomial ambiguity resistant (PAR) precoder for its ability to resist signal distortion induced by finite impulse response (FIR) channels. In particular, the precoder allows a receiver to identify an input signal without knowing the channel characteristics at the expense of a minimum amount of bandwidth increase. A family of such precoders, which is linear (no modulo operations), channel independent, and modulation pattern preserving (except for some occasional 0 symbols), is presented. Also presented is a closed-form algorithm that can simultaneously identify the input signals and zero-forcing equalizers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01212464
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  • 2
    Electronic Resource
    Electronic Resource
    The preliminary study of hydration of polyuridylic acid (poly-U) by FT-IR (1988)
    Springer
    Microchimica acta 94 (1988), S. 315-318 
    Details
    ISSN: 1436-5073
    Keywords: hydration ; polyuridylic acid ; FT-IR spectra
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The FT-IR spectroscopy in the 4000 to 800cm−1 region at 22°C has been used to investigate the hydration process of poly-U at static equilibrium. From the changes of infrared intensity and shift of infrared frequency seen for the polar group (P=O) one of the active sites of hydration and base of poly-U are of importance in the hydration structure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01205897
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  • 3
    Electronic Resource
    Electronic Resource
    The preliminary study of hydration of phosphocholine by FT-IR (1988)
    Springer
    Microchimica acta 94 (1988), S. 361-364 
    Details
    ISSN: 1436-5073
    Keywords: hydration ; phosphocholine ; FT-IR spectra
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The process of hydration of phosphocholine was investigated using FT-IR. From the intensity changes and frequency shifts of some IR bands seen for the polar groups both PO 2 − and C=O have strong effects of hydration. The whole polar head of phosphocholine molecule including the hydrophobic groups CH2 and CH3 is surrounded by hydration water.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01205907
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  • 4
    Electronic Resource
    Electronic Resource
    Fourier transform infrared study on the hydration of polycytidylic acid (poly C) (1988)
    Springer
    Microchimica acta 94 (1988), S. 365-368 
    Details
    ISSN: 1436-5073
    Keywords: polycytidylic acid (poly C) ; hydration ; FT-IR
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The Fourier transform infrared spectra and subtraction spectra of poly C film in the 4000 to 800 cm−1 region at 22°C were measured systematically as a function of relative humidity (from 0% to 100%) at static equilibrium. The peak position and intensity changes of infrared bands prove that the hydration of poly C has happened mainly on the-NH2 and C=O group of cytidine base, phosphate and ribose ring. The ~1664 cm−1 peak (NH2) and the ~1655 cm−1 peak (C=O) show the strongest variation in intensity starting from R.H. 〈12%. In comparison with the hydration of poly A which we studied, it indicates: (1) The polynucleotide molecules are surrounded by hydration water at their active sites. (2) Poly C can more easily be hydrated than poly A, since the polar group C=O of cytidine plays an important role during hydration.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01205908
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  • 5
    Electronic Resource
    Electronic Resource
    FT far IR studies of YBa2Cu3Ox and Ln-Ba-Cu-O superconductor systems (1988)
    Springer
    Microchimica acta 95 (1988), S. 369-372 
    Details
    ISSN: 1436-5073
    Keywords: FT far IR spectra ; YBa2Cu3Ox ; superconductor
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract An investigation of FT far IR spectra of YBa2Cu3Ox highT c superconductor and Ln-Ba-Cu-O systems were carried out at room and liquid nitrogen temperature, respectively. It indicated that the intensity of the IR bands reduces dramatically as the samples transform into superconductor. However, reliable spectra can be obtained from the sintered film samples directly.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01349790
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  • 6
    Electronic Resource
    Electronic Resource
    Raising pyrolysis yield of preceramic polymers of silicon carbonitride (1995)
    Springer
    Journal of materials science 30 (1995), S. 4463-4468 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Polymeric precursors for silicon carbonitrides are prepared by three synthetic routes starting with ammonolysis of dichloromethylsilane (CH3SiHCl2). Two methods for raising pyrolysis yield are investigated. One method is to enhance the degree of crosslinking by copolymerizing with trichlorosilane (SiHCl3) consecutively. The other is to leach out the less soluble macromolecules in the polymer precursor by organic solvents. A 92% pyrolysis yield can be reached through combining these two methods. Those precursors with higher yields are characterized with weight losses and heat events during pyrolysis shifting towards higher temperatures.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00361532
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  • 7
    Electronic Resource
    Electronic Resource
    Cyclic modulation of cross-linking interactions of microtubule-associated protein-2 with actin and microtubules by protein kinase FA (1993)
    Springer
    The protein journal 12 (1993), S. 393-402 
    Details
    ISSN: 1573-4943
    Keywords: Neuronal cytoskeletal system ; factor FA/GSK-3 ; phosphorylation-dephosphorylation ; cross-linking
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The ATP.Mg-dependent type-1 protein phosphatase activating factor (factor FA) was identified as a brain protein kinase that could phosphorylate microtubule-associated protein-2 (MAP-2) and thereby inhibit cross-linking interactions of MAP-2 with actin filaments and microtubules isolated from porcine brain. The phosphorylation sites were found to be equally located on both projection and microtubule-binding domains of MAP-2. Phosphoamino acid analysis revealed that the phosphorylation sites were on both serine and threonine residues, indicating that factor FA is a serine/threonine-specific MAP-2 kinase. Conversely, factor FA was further identified as a MAP-2 phosphatase activator that could promote the dephosphorylation of32P-MAP-2 phosphorylated by factor FA itself and thereby potentiate cross-linking interactions of MAP-2 with actin and microtubules. Furthermore, the two opposing functions of factor FA can be selectively modulated in a reciprocal manner bypH change. For instance, alkalinepH could stimulate factor FA to work as a MAP-2 kinase but simultaneously block it to work as a MAP-2 phosphatase activator to potentiate the inhibition on the cross-linking interactions of MAP-2 with actin and microtubules. Taken together, the results provide initial evidence that a cyclic modulation of cross-linking interactions of MAP-2 with actin filaments and microtubules can be controlled by factor FA, representing an efficient cyclic cascade control mechanism for rapid structural and functional regulation of neuronal cytoskeletal system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01025039
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  • 8
    Electronic Resource
    Electronic Resource
    Identification of the ATP·Mg-dependent protein phosphatase activator (Fa) as a synapsin I kinase that inhibits cross-linking of synapsin I with brain microtubules (1992)
    Springer
    The protein journal 11 (1992), S. 539-546 
    Details
    ISSN: 1573-4943
    Keywords: Microtubules ; synapsin I ; cross-linking ; kinaseFa ; neurotransmission
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The ATP·Mg-dependent protein phosphatase activating factor (Fa) has been identified and purified to near homogeneity from brain. In this report, as evidenced on SDS-polyacrylamide gel electrophoresis followed by autoradiography, factorFa has further been identified as a cAMP and Ca2+-independent brain kinase that could phosphorylate synapsin I, a neuronal protein that coats synaptic vesicles, binds to cytoskeleton, and is believed to be involved in the modulation of neurotransmission. Kinetic study further indicated that factorFa could phosphorylate synapsin I with a lowK m value of about 2 µM and with a molar ratio of 1 mol of phosphate per mole of protein. Peptide mapping analysis revealed that factorFa specifically phosphorylated the tail region of synapsin I but on a unique site distinct from those phosphorylated by Ca2+/calmodulin-dependent protein kinase II and cAMP-dependent protein kinase, the two well-established synapsin I kinases. Functional study further revealed that factorFa could phosphorylate this unique specific site on the tail region of synapsin I and thereby inhibit cross-linking of synapsin I with microtubules. The results further suggest the possible involvement of factorFa as a synapsin I kinase in the regulation of axonal transport process of synaptic vesicles via the promotion of vesicles motility during neurotransmission.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01025031
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  • 9
    Electronic Resource
    Electronic Resource
    The application of the asymptotic method to a clas of strongly nonlinear systems (1993)
    Springer
    Applied mathematics and mechanics 14 (1993), S. 867-872 
    Details
    ISSN: 1573-2754
    Keywords: strongly nonlinear system ; generalized conservative system ; asymptotic solution
    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 In this paper, according to the form of the asymptotic solution of papers [1, 2], the asymptotic method is extended to the following a class of more general strong nonlinear vibration systems (0.1) $$\ddot x + g(x,\dot x) = \varepsilon f(x,\dot x)$$ where g and f are the nonlinear analytical-functions of x and $$\dot x$$ , and ε〉0 is a small parameter. We assume that the derivative system corresponding to ε=0 has periodic solution. The recurrence equations of the asymptotic solution for the system (0.1) are deduced in this paper, and they are applied to practical examples.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02457481
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  • 10
    Electronic Resource
    Electronic Resource
    A Facile Method of Synthesis of a Calix[4]arene Amide and the Crystal Structure of a Self-assembled Calix[4]arene Amide via van Der Waals Interaction (2000)
    Springer
    Journal of inclusion phenomena and macrocyclic chemistry 36 (2000), S. 473-478 
    Details
    ISSN: 1573-1111
    Keywords: calix[4] arene amide ; self-assembly ; X-ray crystal structure ; aminolysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract A new facile method of synthesis of calix[4]arene amide via the aminolysis of the calix[4]arene esters was reported. One ethyl ester of the compound (2) was aminolysized byn-butylamine. The crystal structure of compound (1)shows that one ethyl ester of compound (1) enters into thecavity of another compound (1) forming a long chainhost-guest supramolecule. From the 2D NMR data, the compound(1) does not assemble in THF or CHCl3 solution. The CH-π interaction and crystallization energy might be theimportant driving forces for forming the self-assembledcalix[4]arene.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008161320091
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