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  • 1
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 71 (2000), S. 1069-1074 
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: Due to the development of reliable H− ion sources, charge-exchange injection into circular accelerators has become routine. For preacceleration of heavy ions tandem generators with a stripping foil are used in order to double the energy with the same high voltage. This article reviews recent developments in negative hydrogen ion sources. The underlying physics, operating parameters, and beam characteristics of selected sources will be described and compared. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 73 (2002), S. 900-902 
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: An intensive study has been made at DESY of the transition region between the plasma and vacuum, the so-called sheath, of rf sources for negative hydrogen ions. The plasma and sheath have been analyzed with Langmuir probes even at extraction at 35 kV, with different geometric arrangements utilizing specially designed collars. Langmuir probes were installed in one of the collars. The use of a long ceramic insulated Langmuir probe made a three-dimensional analysis possible. The density, temperature, and potential of the plasma have been calculated based on these data. These studies have resulted in a better understanding of the transition region of not just rf sources but also of magnetron and Penning sources. Studies with a nine-ring collar made it possible to develop a design with a new method to dump the electrons and deliver an increased negative hydrogen current. © 2002 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Boston, USA and Oxford, UK : Blackwell Publishers Inc
    Computational intelligence 17 (2001), S. 0 
    ISSN: 1467-8640
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Computer Science
    Notes: This paper introduces an application of a particular form of rough neural computing in signal analysis. The form of rough neural network used in this study is based on rough sets, rough membership functions, and decision rules. Two forms of neurons are found in such a network: rough membership function neurons and decider neurons. Each rough membership function neuron constructs upper and lower approximation equivalence classes in response to input signals as an aid to classifying inputs. In this paper, the output of a rough membership function neuron results from the computation performed by a rough membership function in determining degree of overlap between an upper approximation set representing approximate knowledge about inputs and a set of measurements representing certain knowledge about a particular class of objects. Decider neurons implement granules derived from decision rules extracted from data sets using rough set theory. A decider neuron instantiates approximate reasoning in assessing rough membership function values gleaned from input data. An introduction to the basic concepts underlying rough membership neural networks is briefly given. An application of rough neural computing in classifying the power system faults is considered.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Science Ltd
    Child 30 (2004), S. 0 
    ISSN: 1365-2214
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine , Psychology
    Notes: Background  The aim of this study was to conduct an audit of parent/carer satisfaction with the service provided for children presenting with movement difficulties [developmental co-ordination disorder (DCD)/dyspraxia] at the out-patient physiotherapy clinic of a specialist tertiary referral paediatric hospital.Method  A postal questionnaire was used to obtain objective and subjective data on the service offered. Factual information on aspects such as waiting time for first appointment, type of intervention offered, etc. was checked against clinical records. Satisfaction with the service was assessed using ratings and open-ended comment.Results  Forty-five families completed the questionnaire. The results showed that the service was generally rated highly. The opportunity to discuss the child's problems and its implications was considered valuable. Among families offered 1 : 1 intervention, a statistically significant correlation emerged between the number of sessions attended and perceived effectiveness. Among families offered a home programme, perceived effectiveness was related to the number of times per week the child practised the programme.Conclusions  This study showed that many children from mainstream schools with co-ordination problems continued to find it difficult to obtain a clear diagnosis. Once a referral and assessment had been achieved, however, parents/carers were shown to be satisfied with the package offered by this service provider.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 9 (1930), S. 1219-1221 
    ISSN: 1432-1440
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 34 (2001), S. 493-495 
    ISSN: 1600-5767
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: The thermal diffuse scattering (TDS) correction developed by Popa & Willis [Acta Cryst. (1997), A53, 537–545] for single-crystal pulsed neutron diffraction is examined via a series of experimental data sets collected at the spallation neutron source IPNS. The effect on the derived temperature parameter values is assessed and compared with reference structures obtained from gamma-ray diffraction. The importance of carrying out TDS corrections is emphasized. Suggestions are made regarding the method of evaluation of the TDS in situations where the elastic constants are unknown.
    Type of Medium: Electronic Resource
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  • 7
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    Morgantown, W.Va. : Periodicals Archive Online (PAO)
    Victorian poetry. 17:3 (1979:Autumn) 265 
    ISSN: 0042-5206
    Topics: English, American Studies
    Notes: BRIEF ARTICLES AND NOTES
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  • 8
    ISSN: 1432-0711
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 1432-069X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Der Einbau14-C-markierter Nucleotide und Aminosäuren in die Nucleinsäuren und in das celluläre Protein PHA-stimulierter menschlicher Lymphocyten wurde durch steigende Adriamycin-, Bleomycin- bzw. Na2HAsO4-Dosen unterschiedlich gehemmt. Die mit Hilfe des Flüssigkeits-Szintillationszählers und teilweise durch14C-Thymidin markierte Autoradiographien gewonnenen Befunde machen deutlich, daß Adriamycin die stärkste Einbauhemmung verursacht. Im Gegensatz dazu ist die Bleomycin- und Arsenatbedingte Inhibition wesentlich geringer ausgeprägt. Durch cytophotometrische Untersuchungen konnte gezeigt werden, daß Adriamycin in der Lage ist die Zellen in der G2-Phase und in der S-Phase zu arretieren, ähnlich reagieren die Zellen auf Bleomycin und Arsenat. Die unterschiedlich ausgeprägte Inhibition des Nucleinsäure- und Proteinstoffwechsels durch Adriamycin, Bleomycin und Arsenat ist mit einer verschiedenen Ansprechbarkeit von Lymphocyten auf die cytostatisch wirksamen Substanzen verbunden.
    Notes: Summary The incorporation of14C-marked nucleotides and amino acids into the nucleic acids and into the cellular protein of PHA-stimulated human lymphocytes was inhibited variably by increasing doses of Adriamycin, Bleomycin and Na2HAsO4. The findings, which were obtained with the aid of the liquid scintillation counter and partly by means of14C-thymidine-marked autoradiographies shows clearly that Adriamycin causes the strongest incorporation inhibition. In contrast to this, the inhibition caused by Bleomycin and arsenate is considerably less destructive. It was shown by means of cytophoto metrical examinations that Adriamycin is capable of fixing cells in the G2 phase and in the S phase. Cells react similarly to Bleomycin and arsenate. The differential inhibition of nucleic acid and protein metabolism induced by Adriamycin, Bleomycin and arsenate is correlated with a varying responsiveness of lymphocytes to the cytostatically effective substances.
    Type of Medium: Electronic Resource
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  • 10
    ISSN: 1432-0711
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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