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  • 1
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 71 (2000), S. 2577-2581 
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: This article describes measurement of oscillator instabilities by a method using the real-time multichannel scaler (RTMS). A theoretical model for such application is also considered. The general problem of the oscillator instability measurements in time domain is discussed. The results of oscillator instability measurements using the real-time multichannel scaler and a time interval analyzer are compared. The full range of application of this method is up to 7E-7 and depends strongly on the RTMS construction. We present the results of oscillator instability measurements of the order of 3E-5, using the RTMS with a resolution of 3.13 ns and the range of operation 3.28 ms. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    European archives of oto-rhino-laryngology and head & neck 257 (2000), S. 382-385 
    ISSN: 1434-4726
    Keywords: Key words Subglottic stenosis in children ; Laryngotracheoplasty ; Laryngotracheal split ; Cricotracheal resection ; Laser surgery
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract During the 12-year period between June 1987 and June 1999, 141 children underwent curative treatment for subglottic laryngeal stenosis at La Timone Children’s Hospital in Marseille, France. Ninety-six children (68%) were under the age of 5 years; 106 (75%) presented with acquired stenosis and 93 had narrowing involving over 70% of the subglottic lumen. Endoscopic laser surgery was performed in 25 cases and open surgery in 116. Open surgical techniques included laryngotracheoplasty with autologous cartilage interposition in 83 cases, laryngotracheal split in 22, and cricotracheal resection in 11. After decannulation, 132 children (94%) were able to breathe normally through the upper airway. Perspectives for development of new techniques and improvement of conventional methods are discussed.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Open systems & information dynamics 7 (2000), S. 139-156 
    ISSN: 1573-1324
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Natural Sciences in General
    Notes: Abstract After presenting by extensive quotations the views of prominent philosophers, White-head, Schopenhauer, Wittgenstein and Popper, concerning human picture of the world, the picture of the physical world represented in language is discussed. It is shown that the categorical language based on Boolean two-valued logic is not sufficient for the description of such basic physical concepts as energy, force, entropy (information), etc. Such modal concepts as possibility, necessity, potentiality, probability, are needed in addition. Relativity physics, as well as quantum mechanics and field theory, shifted physical theory more and more in the direction of nonclassical modal logic. But if we pass from physics to general information dynamics of open systems (cognitive dynamics), where, except of the physical world, also mental and cultural worlds (Popperian world 1, world 2, and world 3) are considered, the classical scheme of information channel is not sufficient. We define, therefore, a generalized language scheme in which the three sets fixing the general meaning, denotation (D), connotation (C), and emotional aspect (E), are essential. At the end some classifications of sentences and verbs (predicates) are presented, as examples of primary syntactic, semantic, and pragmatic categories.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1573-2959
    Keywords: benthos ; bioresidues ; Florida Bay ; periphyton ; sediment toxicity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Periphyton colonization and sediment bioassessment were used ina survey to compare the relative environmental condition ofsampling sites located in Florida Bay and four peripheral sloughareas during the summer of 1995. Periphyton biomass, pigmentcontent, tissue quality and community composition weredetermined. In addition, benthic community composition and thetoxicities of whole sediments and associated pore waters weredetermined for two species of rooted macrophytes, an epibenthicinvertebrate and bioluminescent bacteria. Several locational differences were observed for the response parameters.Periphyton biomass was significantly greater in the Taylor Riverand the least in Shell Creek (P 〈 0.05). Most sediments were notacutely toxic to mysid shrimp nor phytotoxic. However, sedimentsfrom the Taylor River were more phytostimulatory than others (P〈 0.05). Contaminant bioresidues were similar at most sites,however, mercury, chromium and nickel concentrations weregreater for periphyton colonized in the Taylor River and TroutCreek areas. Structural characteristics of the periphytic algalcommunity usually were statistically similar but a consistenttrend of lower density and diversity was evident for ShellCreek. The benthic community was the least diverse and dense inthe Canal C-111. The results of this study provide an initialindication of differences in the role of several slough areas aspossible sources of bioavailable contaminants to Florida Baywhich warrants additional investigation.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Chemistry of heterocyclic compounds 36 (2000), S. 482-482 
    ISSN: 1573-8353
    Keywords: benzyl chloride ; N-methylmorpholine ; furfurylideneacetylacetone ; cyanoselenoacetamide ; 1,4-dihydro-1,6-naphthyridine derivative ; one-pot syntheses
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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