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  • 2000-2004
  • 1995-1999  (81)
  • 1965-1969
  • 1960-1964  (7)
  • 1950-1954
  • 1998  (81)
  • 1964  (7)
  • 1
    Digitale Medien
    Digitale Medien
    NONLINEAR MODELING AND PREDICTION OF A RIVER FLOW SYSTEM (1998)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of the American Water Resources Association 34 (1998), S. 0 
    Details
    ISSN: 1752-1688
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Architektur, Bauingenieurwesen, Vermessung , Geographie
    Notizen: : Model estimation and prediction of a river flow system are investigated using nonlinear system identification techniques. We demonstrate how the dynamics of the system, rainfall, and river flow can be modeled using NARMAX (Nonlinear Autoregressive Moving Average with eXogenuous input) models. The parameters of the model are estimated using an orthogonal least squares algorithm with intelligent structure detection. The identification of the nonlinear model is described to represent the relationship between local rainfall and river flow at Enoree station (inputs) and river flow at Whitmire (output) for a river flow system in South Carolina.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1752-1688.1998.tb05435.x
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  • 2
    Digitale Medien
    Digitale Medien
    Effect of in utero Incubation on the Metabolism of Rabbit Spermatozoa (1964)
    [s.l.] : Nature Publishing Group
    Nature 201 (1964), S. 943-944 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] Table 1. OXYGEN UPTAKE, GLUCOSE UTILIZATION AND LACTATE PRODUCTION OF FRESH AND in utero INCUBATED SPERM (Sperm counts/flask: 5-88 x 108-7-37 x 108 for fresh sperm and 1-68 x 108-2-44 x 108 for in utero incubated sperm) O2 uptake (//in. mole/ 10' sperm) ~ ' ~ . " . Exp. At the end of Fresh ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/201943a0
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  • 3
    Digitale Medien
    Digitale Medien
    Three-Photon Absorption in InAs (1998)
    Springer
    Optical and quantum electronics 30 (1998), S. 193-200 
    Details
    ISSN: 1572-817X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik , Physik
    Notizen: Abstract Using 125 ps laser pulses, we observe three-photon absorption in room temperature InAs at a wavelength of 9.54 µm. This effect is readily identified by temperature-tuning the semiconductor bandgap through the three-photon absorption edge. A three-photon absorption coefficient of K3 = 1 ± 0.6 × 10-3 cm3 MW-2 is extracted from non-linear absorption data obtained with an open-aperture Z-scan. Time-resolved measurement at high irradiance reveals an increase of absorption due to hot carriers. We also present an autocorrelation measurement of our CO2 laser pulse that shows two complete optical free-induction-decay cycles.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1023/A:1006962228937
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  • 4
    Digitale Medien
    Digitale Medien
    Temporal Constraint Satisfaction Techniques in Job Shop Scheduling Problem Solving (1998)
    Springer
    Constraints 3 (1998), S. 203-211 
    Details
    ISSN: 1572-9354
    Schlagwort(e): temporal constraint satisfaction ; job shop scheduling
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Informatik
    Notizen: Abstract We describe a restriction of Dechter, Meiri and Pearl's TCSPs (Temporal Constraint Satisfaction Problems) sufficiently expressive to represent any job shop scheduling problem. A solver based on the restriction is then described, which is similar to Ladkin and Reinefeld's qualitative interval network solver; except, however, that the filtering method used during the search is not path consistency but either ULT (Upper-Lower Tightening) or LPC (Loose Path- Consistency), which are both less effective but have the advantage of getting rid of the so-called “fragmentation problem”.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1023/A:1009777711218
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  • 5
    Digitale Medien
    Digitale Medien
    A Tabu Search Approach for the Resource Constrained Project Scheduling Problem (1998)
    Springer
    Journal of heuristics 4 (1998), S. 123-139 
    Details
    ISSN: 1572-9397
    Schlagwort(e): project management ; limited resources ; tabu search
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Mathematik
    Notizen: Abstract An appropriate tabu search implementation is designed to solve the resource constrained project scheduling problem. This approach uses well defined move strategies and a structured neighbourhood, defines appropriate tabu status and tenure and takes account of objective function approximation to speed up the search process. A sound understanding of the problem has helped in many ways in designing and enhancing the tabu search methodology. The method uses diversification, intensification and handles infeasibility via strategic oscillation. The above methodology is tested on existing problems from the literature and also on parametrically generated problems with encouraging results. For comparison of results, optimal solutions are used in the former and lower bounds obtained by Lagrangian heuristics are used in the latter.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1023/A:1009673512884
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  • 6
    Digitale Medien
    Digitale Medien
    Electrical Properties of SiGe Epitaxial Layers for Photovoltaic Application as Studied by Scanning Electron Microscopical Methods (1998)
    s.l. ; Stafa-Zurich, Switzerland
    Solid state phenomena Vol. 63-64 (Dec. 1998), p. 509-518 
    Details
    ISSN: 1662-9779
    Quelle: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Thema: Physik
    Materialart: Digitale Medien
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/26/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.63-64.509.pdf
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  • 7
    Digitale Medien
    Digitale Medien
    Adrenal and Plasma Corticosteroids and Ascorbic Acid Content during Bone Fracture Healing (1964)
    [s.l.] : Nature Publishing Group
    Nature 204 (1964), S. 386-387 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] This investigation deals with the changes occurring in the levels of adrenal and plasma corticosteroids, and of vitamin C, at various times after experimental bone fracture. Special attention was directed to changes during the first week. Ninety adult male white rats, weighing about 220 g, were ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/204386a0
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  • 8
    Digitale Medien
    Digitale Medien
    Speciation of vanadium (IV) and vanadium (V) with Eriochrome Cyanine R in natural waters by solid phase spectrophotometry (1998)
    Springer
    Fresenius' journal of analytical chemistry 360 (1998), S. 31-37 
    Details
    ISSN: 1432-1130
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Abstract The separation and preconcentration of vanadium (IV) and vanadium (V) using Sephadex DEAE A-25 with Eriochrome Cyanine R has been studied, based on the preconcentration of vanadium (IV) in the first step and V(V) after reduction with ascorbic acid in the second step. Factors affecting the optimum fixation of the complex were investigated. The absorbance of the solid phase is measured directly at 563 nm for V(IV), at 585 nm for V(V) and at 750 nm for both. The proposed method provides a simple and specific procedure for the separation of vanadium in natural waters. The calibration graph is linear up to 150 ng/mL, with RSD of 4.7% for V(IV) and 4.0% for V(V). The detection limits are 1.6 and 1.4 ng/mL for V(IV) and V(V), respectively.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s002160050637
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  • 9
    Digitale Medien
    Digitale Medien
    Differential induction of enzymes involved in anaerobic metabolism of aromatic compounds in the denitrifying bacterium Thauera aromatica (1998)
    Springer
    Archives of microbiology 170 (1998), S. 120-131 
    Details
    ISSN: 1432-072X
    Schlagwort(e): Key words Anaerobic aromatic metabolism ; Benzoyl-CoA reductase ; Phenylphosphate carboxylase ; 4-Hydroxybenzoyl-CoA reductase ; 2-Aminobenzoate ; Phenylalanine ; Phenylacetyl-CoA ; Phenylglyoxylate ; Toluene ; CoA ligase
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract Differential induction of enzymes involved in anaerobic metabolism of aromatic substrates was studied in the denitrifying bacterium Thauera aromatica. This metabolism is divided into (1) peripheral reactions transforming the aromatic growth substrates to the common intermediate benzoyl-CoA, (2) the central benzoyl-CoA pathway comprising ring-reduction of benzoyl-CoA and subsequent β-oxidation to 3-hydroxypimelyl-CoA, and (3) the pathway of β-oxidation of 3-hydroxypimelyl-CoA to three acetyl-CoA and CO2. Regulation was studied by three methods. 1. Determination of protein patterns of cells grown on different substrates. This revealed several strongly substrate-induced polypeptides that were missing in cells grown on benzoate or other intermediates of the respective metabolic pathways. 2. Measurement of activities of known enzymes involved in this metabolism in cells grown on different substrates. The enzyme pattern found is consistent with the regulatory pattern deduced from simultaneous adaptation of cells to utilisation of other aromatic substrates. 3. Immunological detection of catabolic enzymes in cells grown on different substrates. Benzoate-CoA ligase and 4-hydroxybenzoate-CoA ligase were detected only in cells yielding the respective enzyme activity. However, presence of the subunits of benzoyl-CoA reductase and 4-hydroxybenzoyl-CoA reductase was also recorded in some cell batches lacking enzyme activity. This possibly indicates an additional level of regulation on protein level for these two reductases.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s002030050623
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  • 10
    Digitale Medien
    Digitale Medien
    Yield and activity of Autographa californica multicapsid nucleopolyhedrovirus and Phthorimaea operculella granulosis virus in cloned and uncloned cell lines of P. operculella (1998)
    Springer
    Cytotechnology 26 (1998), S. 103-110 
    Details
    ISSN: 1573-0778
    Schlagwort(e): Phthorimaea operculella ; lepidoptera ; cell line ; AcMNPV ; PTMGV
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Notizen: Abstract Three selected uncloned Pop 2, Pop 3, Pop 4 and two cloned cell lines Pop cl1A and Pop cl2B were derived from the original cell line established from Phthorimaea operculella (ORS-Pop-93). Three new non-selected cell lines ORS-Pop-94A, ORS-Pop-94B and ORS-Pop-95 were also established from embryos of the same insect. Differences in morphology, growth rate and polypeptide profile were determined between these cell lines. All the cell lines were susceptible to the Autographa californica nucleopolyhedrovirus (AcMNPV). The cloned cell lines produced higher levels of AcMNPV (TCID-50 and PIB) than the parental cells and at the same rate as the Sf9 reference cell line. Substantial amounts of viral DNA were synthesized in the clone Pop cl 2B after infection with the granulosis virus of the potato tuber moth P. operculella (PTMGV) and a complete multiplication was obtained in the ORS-Pop-95 cell line. The comparison between Pop cell lines which support limited or complete replication of certain baculoviruses can offer insights into some of the molecular barriers which restrict the host range of these viruses. These cell lines with variable susceptibility to baculoviruses could also be used for in vitro recombinations, increasing their virus host range to be used for the control of this pest.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1023/A:1007972430402
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