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  • 1
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 60 (1989), S. 186-197 
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: We describe the base line design for the wiggler to be used in conjunction with the Experimental Test Accelerator-II (ETA-II) to produce high-power microwave radiation in the Intense Microwave Prototype (IMP) free-electron laser experiment. This design produces negligible noise growth for spontaneous noise sources as large as 20 dB above shot noise, and thus corrects the defects present in earlier iterations of the design, which resulted in diminished gain at the signal frequency because of space-charge effects as well as enhanced spontaneous noise growth at frequencies lower than the signal frequency. In addition, more realistic engineering design constraints on the waveguide size and the wiggler gap spacing have been set by the waveguide wall loading and the electron beam fill factor and have been incorporated in the final base line design. The design assumes that the ETA-II accelerator will supply an electron beam with an energy of 10 MeV, a current of 3 kA, and a brightness of 1.0×108 A/(m rad)2. With this beam and 500 W of input power at a frequency of 250 GHz, the peak output TE01 power predicted by the simulation codes, for a rectangular waveguide of dimensions 3.5×3.0 cm2, is in excess of 12 GW, corresponding to an extraction efficiency of 44%. The wiggler has an overall length of 5.5 m and a period of 10 cm. It consists of a 2-m untapered section at a magnetic field of about 4.3 kG followed by a 3.5-m tapered section with magnetic field ranging from a peak value of 4.5 kG to a minimum of 390 G. The growth of the beam linear fill factor to about 50% sets the lower limit of the magnetic field strength in the tapered wiggler region. A nonsteering, nondisplacing binomial winding pattern has been incorporated into the wiggler profile. The base line design is a 2(1331) pattern spanning six magnet poles, giving an inherent tapering resolution of 30 cm.
    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 57 (1986), S. 2100-2100 
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: Neutral molecular densities just outside the plasma edge are measured at 11 axial locations in tandem mirror experiment-upgrade (TMX-U). These densities are time dependent and vary greatly with different modes of TMX-U plasma operation. The densities are low in the ion-cyclotron resonance heated central cell because of plasma pumping. The density is high in the plug near the sloshing-ion turning point. These densities are measured with a combination of new retractable, and fixed, magnetically unshielded Bayard–Alpert gauges that can be oriented to provide calibrated operation in the high (7 kG) TMX-U magnetic fields. The role of the neutral density in simultaneously fueling and charge exchanging away the plug density is modeled using smoke, a Fokke–Planck code.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Physics of Fluids 28 (1985), S. 3116-3126 
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Whistler mode electron-cyclotron resonance heating (ECRH) has been performed simultaneously with whistler mode electron-cyclotron emission measurements on an axisymmetric magnetic mirror plasma. Results presented include a study of the early plasma startup phase and two instability phases, one believed to be caused by a whistler instability and another by magnetohydrodynamic (MHD) flute instability. Enhanced microwave emission at frequencies below the midplane electron-cyclotron frequency has been correlated with enhanced electron endloss during the whistler instability. Cyclotron emission spectra during the startup phase match predictions for a "sloshing electron'' type distribution based on numerical modeling. This distribution also agrees with anisotropic distributions resulting from electron-cyclotron heating as predicted by Fokker–Planck computer simulations. Experimentally measured heating rates show good agreement with simplified analytical models based on stochastic heating.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    European journal of clinical pharmacology 35 (1988), S. 249-253 
    ISSN: 1432-1041
    Keywords: loratadine ; terfenadine ; clemastine ; psychomotor performance ; subjective feeling ; diazepam
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary We have studied the effects of three antihistamines on task performance in two separate experiments. Healthy subjects were tested at weekly intervals in a double-blind, Latin square design. In Experiment I the subjects were treated orally with loratadine 10 mg, clemastine 1 mg, terfenadine 60 mg, or placebo. In Experiment II 5 mg diazepam was given orally with each of the four treatments used in Experiment I. In both experiments subjects' performance was evaluated in reaction time and tracking tasks after treatment. In both experiments, the tracking task initially was performed alone and then simultaneously with a continuous memory task; the subject also graded their mental status on visual analogue rating scales. In both experiments task performance was not generally impaired after treatment with loratadine or terfenadine. The concomitant administration of diazepam in Experiment II appeared not to affect subjects' performance. However, clemastine caused a decay in subjects' performance in both Experiments I and II, but only on the tracking task. At the conclusion of both experiments, sleepiness was reported by more subjects when treated with clemastine than when treated with loratadine, terfenadine, or placebo.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    European journal of nuclear medicine 11 (1986), S. 363-364 
    ISSN: 1619-7089
    Keywords: Renography ; N-Succinyldesferrioxamine B
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The mechanism of the excretion of 67Ga-N-succinyldesferrioxamine B (SDF) was investigated in five healthy dogs. Comparison of the SDF clearance rates for whole blood and plasma as well as SDF renograms with those of 131I-o-iodohippuric acid (OIH) and 111In-diethy-lenetriamine-pentaacetic acid (DTPA) revealed that SDF is cleared by glomerular filtration and not by an active tubular transport mechanism.
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Journal of chemical ecology 14 (1988), S. 2005-2018 
    ISSN: 1573-1561
    Keywords: Colorado potato beetle ; Leptinotarsa decemlineata ; Coleoptera ; Chrysomelidae ; Pieris brassicae ; Lepidoptera ; Pieridae ; olfactory coding ; information processing ; olfactory receptors ; antennal lobe ; response profiles ; stimulus mixtures ; pheromones ; host plant odor ; semiochemicals
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Information processing in the olfactory pathway underlying the perception of semiochemicals by insects is discussed. Both the chemical message for mates and the message for food consist of blends of chemicals. Olfactory receptors in an insect species are tuned to the detection of those compounds which comprise such chemical messages for that species. The classification of receptors as specialists or generalists coincides with two concepts of information processing, i.e., labeled lines and across-fiber patterns, respectively. The olfactory code coming from antennal receptors inPieris brassicae larvae is a combination of labeled lines and across-fiber patterning. When antennae of adult Colorado potato beetles,Leptinotarsa decemlineata, are stimulated by binary mixtures of leaf odor components, the pattern of neural activities in the olfactory receptors shows some separation into two channels, quantitative versus qualitative detection. The separation is complete in the antennal lobe of this beetle.
    Type of Medium: Electronic Resource
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  • 7
    Publication Date: 2024-01-12
    Description: The possible zone of contact between Pyrgus (malvae) malvae Linnaeus, 1758, and P. (malvae) melotis Duponchel, 1832, is re-examined. The two taxa apparently meet (in the subspecies malvae and ponticus Reverdin, 1914, respectively) in N. and W. Turkey and possibly in S. Russia north of the Caucasus. There are, however, only few localities or areas from where both are known: Amasya and north of Ankara in N. Turkey and Izmir in W. Turkey. In these areas the two taxa do not seem to recognize each other as belonging to the same species. A population with an intermediate character is known to occur in the Boz Dagh area east of Izmir. The population seems remarkably constant in this character. Its origin is obscure. The available data do not prompt us to change our view on the superspecies status of Pyrgus (malvae). Notes are added on the apparent incongruence of phylogenetic and biological relationships in this case. P. (malvae) melotis is widely distributed in Turkey, extending east to N. Iran, north to north of the Caucasus and south to Israel. Old records of melotis from Greece or the Aegean islands are highly improbable and should be omitted from further literature records. On the basis of external characters two subspecies are distinguished: melotis and ponticus.
    Keywords: Lepidoptera ; Hesperiidae ; Pyrgus ; malvae ; melotis ; superspecies
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
    Format: application/pdf
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  • 8
    facet.materialart.
    Unknown
    In:  Zoologische Mededelingen vol. 61 no. 26, pp. 371-385
    Publication Date: 2024-01-12
    Description: The name Papilio fritillarius Poda, 1761, is shown to be a nomen dubium. It has caused much confusion and has been applied to five or six different species since the first publication and to three different species in the last 40 years. To put an end to the confusion a neotype is designated.\nFor the neotype a specimen has been selected of the species currently known as Pyrgus malvae (Linnaeus), thus making Papilio fritillarius Poda, 1761, a junior subjective synonym of Papilio malvae Linnaeus, 1758. Consequently, Poda\'s name can no longer be used for the species named Papilio carthami by H\xc3\xbcbner, [1813] and now currently placed in the genus Pyrgus. The same species was named Papilio malvae maior by Fabricius (1787) and for reasons of priority H\xc3\xbcbner\'s name should fall for it. However, maior Fabricius has never been used as the valid name for the species and in this century has only been mentioned three times in synonymy. Therefore, a request will be submitted to the International Commission of Zoological Nomenclature to suppress the name, thus not only saving Papilio carthami H\xc3\xbcbner (now placed in Pyrgus) but also Syrichthus serratulae major Staudinger, 1878 (currently considered a subspecies of Pyrgus serratulae (Ramburs)), which would be in need of another name if Pyrgus maior (Fabricius) would remain the senior synonym of Pyrgus carthami (H\xc3\xbcbner).
    Keywords: nomenclature ; neotype ; suppression ; Hesperiidae ; Pyrgus ; fritillarius ; carthami ; maior ; malvae
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
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  • 9
    facet.materialart.
    Unknown
    In:  Zoologische Verhandelingen vol. 231 no. 1, pp. 1-40
    Publication Date: 2024-01-12
    Description: The five known species of the African genus Chondrolepis Mabille are extensively described and figured and two new species are added. Keys are given to the males and females separately.\nMost species are restricted to montane habitats, mainly in East Africa. Based on their phylogeny the geographic history of the species is analyzed. It is concluded that the distribution agrees with the predictions to be derived from the hypotheses that montane forests were very much restricted during the last Glacial Period of the Northern Hemisphere, later on becoming more widespread than at present, and that the contact between the Cameroun highlands and the highlands of East Africa was through species that temporarily lived in the intervening lowland forests and not through a continuous belt of montane forest across the African continent. There are indications that for Chrondrolepis this contact was possible twice. Similarly, but at other periods, a contact between the montane habitats of East Za\xc3\xafre and Southeast Tanzania may have occurred twice.\nWhile the diversification of the genus is closely linked with the history of the montane forests, the origin of the genus is supposed to be the result of the desiccation of the Limpopo Valley.\nTesting of this hypothesis by studying the phylogeny and biogeography of other groups which should have been influenced in the same way, could lead to a better understanding of the origin of the South African fauna of forests and forest margins.
    Keywords: Lepidoptera ; Hesperiidae ; Chondrolepis ; new species ; phylogeny ; biogeography ; Afromontane habitat.
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
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