Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Intrinsic resputtering in pulsed-laser deposition of lead-zirconate-titanate thin films (1995)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 66 (1995), S. 245-247 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Pulsed-laser deposition (PLD) of lead-zirconate-titanate [Pb(Zrx,Ti1−x)O3] (PZT) thin films under low ambient pressure has been investigated by studying the angular deposition distributions of the constituent elements of the films. Nonstoichiometric profiles are observed and a dip occurs near the target surface normal of the deposition profile of lead. Experimental results show that intrinsic resputtering of the film is important in the PLD process and is responsible for the anomalous distribution of lead. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.113560
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Pulsed CO2 laser ablation of graphite and polymers (1998)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 83 (1998), S. 2286-2290 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Spectroscopic analysis of the emission plumes of graphite, polyimide, polyethylene terepthalate, and polymethylmethacrylate that have been ablated by using a pulsed CO2 laser operating at 10.6 μm shows the presence of CN and C2, species not previously reported for CO2 laser ablation. The gross dynamics of the luminous plume, which was studied by using a streak camera, compares favorably with predictions from the snowplow model, which also accurately forecasts the time history of the plume expansion for a wide range of background gas pressures and laser fluences. Framing shadowgraphy reveals the onset of laser-supported detonation waves at approximately 50 mbar Ar, thus somewhat limiting the validity of this model. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.366970
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    The role of ambient gas scattering effect and lead oxide formation in pulsed laser deposition of lead–zirconate–titanate thin films (1996)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 69 (1996), S. 2030-2032 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The angular distribution of lead in films deposited by pulsed laser irradiation of lead–zirconate–titanate and lead targets are studied as a function of ambient gas (argon or oxygen), gas pressure, and substrate temperature. When the substrate is kept in vacuum and at room temperature, a dip in the lead content attributable to the intrinsic resputtering of lead is observed at the position of the target surface normal. In the presence of an ambient gas, the dip disappears and the lead content increases at all angles. These results are attributed to a reduction of resputtering arising from scattering of the ablated species by ambient gas molecules. Under ambient oxygen and at high substrate temperature, the retention of lead content in the deposited films is largely due to the formation of lead oxide. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.116869
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Laser fluorimetry studies of ionpair aggregation in ionomers derived from copolymers and polymer containing 2-vinylfluorene (1987)
    Springer
    Polymer bulletin 17 (1987), S. 375-381 
    Details
    ISSN: 1436-2449
    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: Summary Time resolved fluorescence technique was used to demonstrate physically the ionpair aggregation phenomena in the ionomers containing fluorenylsodium as the pendant group along the polymer chains in THF at 25°C. It was found that ionpairs in the ionomer with mole fraction of fluorenylsodium equal to 0.02 did not associate to form stable aggregate. However, the ionpairs would aggregate in those ionomers with higher fluorenylsodium contents. In the homopolymer of vinylfluorenylsodium, extensive aggregation of the ionpairs was observed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00955723
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    M3 muscarinic receptors on murine HSDM1C1 cells: Further functional, regulatory, and receptor binding studies (1995)
    Springer
    Neurochemical research 20 (1995), S. 61-68 
    Details
    ISSN: 1573-6903
    Keywords: Muscarinic ; M3 receptors ; HSDM1C1 cells ; PI turnover ; [3H]4-DAMP binding ; Receptor binding
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract In the present studies, the pharmacology and regulation of the functional muscarinic receptors on HSDM1C1 cells were probed using phosphoinositide (PI) turnover assays. In addition, the receptor binding of the putative M3-selective radioligand, [3H]4-DAMP, to cell homogenates was characterized. Carbachol (EC50=9 μM), (+)muscarine (EC50=4.5 μM) and cis-dioxolane (EC5=0.72 μM) were full agonists which stimulated PI turnover by 13.3±1.0 fold above basal values. The potencies of numerous agonists in this assay system were relatively similar to their affinities in receptor binding assays. Exposure of HSDM1C1 cells to 10 nM–10 μM muscarine during the last 24h of [3H]myo-inositol-labeling resulted in a concentration-dependent reduction in the cisdioxolane affinity and maximal PI response induced by subsequent treatment with cis-dioxolane. pertussis toxin (5–2000 ng/ml) caused a partial reduction in the cis-dioxolane-induced PI turnover. Likewise, exposure of the HSDM1C1 cells to an active phorbol ester (TPA) resulted in a partial inhibition of the cis-dioxolane-induced (100 μM) PI turnover. The half-maximal effect of TPA was produced at 1.8±0.3 nM. [3H]4-DAMP binding to cell homogenates was of high affinity (Kd=0.19±0.04 nM) and moderate capacity (Bmax=201±22 fmol/mg protein). The pharmacological specificity (4-DAMP〉p-FHHSiD〉dicyclomine〉pirenzepine〉methoctramine〉AFDX-116 〉gallamine) resembled that for [3H]NMS binding and correlated well with that observed for inhibition of PI turnover. These studies further support the identification of M3 receptors on HSDM1C1 cells. These receptors have been shown to be influenced by pertussis toxin, an active phorbol ester and to exhibit desensitization.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00995154
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Optimal control computation for parabolic systems with boundary conditions involving time delays (1987)
    Springer
    Journal of optimization theory and applications 53 (1987), S. 475-507 
    Details
    ISSN: 1573-2878
    Keywords: Parabolic differential equations ; second boundary-value problems ; time-delayed arguments ; distributed optimal control problems ; necessary and sufficient conditions ; existence theory ; algorithms ; convergence of algorithms ; Galerkin's scheme ; lumped-parameter systems
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract In this paper, we consider a class of optimal control problems involving a second-order, linear parabolic partial differential equation with Neumann boundary conditions. The time-delayed arguments are assumed to appear in the boundary conditions. A necessary and sufficient condition for optimality is derived, and an iterative method for solving this optimal control problem is proposed. The convergence property of this iterative method is also investigated. On the basis of a finite-element Galerkin's scheme, we convert the original distributed optimal control problem into a sequence of approximate problems involving only lumped-parameter systems. A computational algorithm is then developed for each of these approximate problems. For illustration, a one-dimensional example is solved.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00938951
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    A feasible directions algorithm for time-lag optimal control problems with control and terminal inequality constraints (1985)
    Springer
    Journal of optimization theory and applications 46 (1985), S. 295-317 
    Details
    ISSN: 1573-2878
    Keywords: Nonlinear time-lag systems ; linear control constraints ; nonlinear terminal inequality constraints ; conditional gradient methods ; feasible direction methods ; control parametrization ; initial feasible control ; computational schemes ; finite convergence
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract A computational algorithm for a class of time-lag optimal control problems involving control and terminal inequality constraints is presented. The convergence properties of the algorithm is also investigated. To test the algorithm, an example is solved.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00939286
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Optimal control computation for nonlinear time-lag systems (1985)
    Springer
    Journal of optimization theory and applications 47 (1985), S. 91-107 
    Details
    ISSN: 1573-2878
    Keywords: Control parameterization ; piecewise constant functions ; nonlinear hereditary systems ; linear control constraints ; computational schemes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract In this paper, a computational scheme using the technique of control parameterization is developed for solving a class of optimal control problems involving nonlinear hereditary systems with linear control constraints. Several examples have been solved to test the efficiency of the technique.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00941318
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Convergence of a feasible directions algorithm for relaxed controls in time-lag systems (1987)
    Springer
    Journal of optimization theory and applications 53 (1987), S. 461-474 
    Details
    ISSN: 1573-2878
    Keywords: Nonlinear time-lag systems ; linear control constraints ; nonlinear terminal inequality constraints ; feasible direction methods ; accumulation points ; relaxed controls ; relaxed control problems ; necessary conditions for optimality
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract In this paper, we consider a class of time-lag optimal control problems involving control and terminal inequality constraints. A feasible direction algorithm has been obtained by Teo, Wong, and Clements for solving this class of optimal control problems. It was shown that anyL ∞ accumulation points of the sequence of controls generated by the algorithm satisfy a necessary condition for optimality. However, suchL ∞ accumulation points need not exist. The aim of this paper is to prove a convergence result, which ensures that the sequence of controls generated by the algorithm always has accumulation points in the sense of control measure, and these accumulation points satisfy a necessary condition for optimality for the corresponding relaxed problem.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00938950
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Gradient-flow approach for computing a nonlinear-quadratic optimal-output feedback gain matrix (1995)
    Springer
    Journal of optimization theory and applications 85 (1995), S. 75-96 
    Details
    ISSN: 1573-2878
    Keywords: Optimal control ; infinite horizon ; nonlinear-quadratic regulator problem ; linear state feedback ; approximate problems ; gradient-flow based algorithm
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract In this paper, an approach is proposed for solving a nonlinear-quadratic optimal regulator problem with linear static state feedback and infinite planning horizon. For such a problem, approximate problems are introduced and considered, which are obtained by combining a finite-horizon problem with an infinite-horizon linear problem in a certain way. A gradient-flow based algorithm is derived for these approximate problems. It is shown that an optimal solution to the original problem can be found as the limit of a sequence of solutions to the approximate problems. Several important properties are obtained. For illustration, two numerical examples are presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02192300
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...