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  • 1
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    Segregation processes in vesiculating magmas (2020)
    Elsevier
    Details
    Publication Date: 2020-12-18
    Description: Vesiculation of crystallising magma can produce either a mobile vesicular magma or a rigid network of crystals containing vesicular liquid. Where partially crystallized rigid mush underlies less-crystallized magma, such as near the base of a lava flow or in the cumulus pile of a magma chamber, evolved interstitial melt and/or gas may escape into the main body of magma. The consequences of this may include contamination of the overlying liquid with gas and interstitial melt, or intrusion of diapirs of vesicular evolved liquids to form vertical vesicle cylinders and other segregation features found in many basaltic lava flows and sills. Analog experiments were used to investigate some of the phenomena that can arise during vesiculation within a crystal mush, which was simulated by pumping air through a porous plate that formed the floor of a container filled with a viscous liquid floored with a layer of glass beads. Experiments used either a single liquid or two stably stratified liquids with a liquid interface either coincident with the top of the porous layer of beads or slightly above the porous layer. For a range of liquid viscosities and air flow rates (vesiculation rates), individual bubbles emerged from the top of the porous layer of beads and carried a thin trail of interstitial liquid into the overlying liquid. The number of bubble trains leaving the surface of the porous bed increased with decreasing liquid viscosity and flow rate, and with increasing bead size (and, hence, with increasing permeability). Analog vesicle cylinders, composed of diapirs of bubbly interstitial liquid, were produced only when a layer of buoyant bubbly liquid lay above the surface of the porous layer. The relative size of the bubbles and constrictions within the porous layer are argued to control whether individual bubbles (leading to bubble trains) or vesicular liquid (leading to vesicle cylinders) leaves the porous layer and hence whether vesicle cylinders can form.
    Description: Published
    Description: 287–300
    Description: 2V. Struttura e sistema di alimentazione dei vulcani
    Description: JCR Journal
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 2
    Electronic Resource
    Electronic Resource
    COCHLEAR IMPLANTS: Some Likely Next Steps* (2003)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Biomedical Engineering 5 (2003), S. 207-249 
    Details
    ISSN: 1523-9829
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Technology , Medicine
    Notes: Abstract The history of cochlear implants is marked by large improvements in performance, especially over the past two decades and especially due to the development of ever-better processing strategies. Although the progress to date has been substantial, present devices still do not restore normal speech reception, even for top performers and particularly for listening to speech in competition with noise or other talkers. In addition, a wide range of outcomes persists, with some patients receiving little benefit using the same devices that support high levels of speech reception for others. The purpose of this review is to describe some likely possibilities for further improvement, including (a) combined electric and acoustic stimulation of the auditory system for patients with significant residual hearing, (b) use of bilateral implants, (c) a closer replication with implants of the processing steps in the normal cochlea, and (d) applications of knowledge about factors that are correlated with outcomes to help patients presently at the low end of the performance scale.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.bioeng.5.040202.121645
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    COCHLEAR IMPLANTS: Some Likely Next Steps* (2003)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Biomedical Engineering 5 (2003), S. 207-249 
    Details
    ISSN: 1523-9829
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Technology , Medicine
    Notes: The history of cochlear implants is marked by large improvements in performance, especially over the past two decades and especially due to the development of ever-better processing strategies. Although the progress to date has been substantial, present devices still do not restore normal speech reception, even for top performers and particularly for listening to speech in competition with noise or other talkers. In addition, a wide range of outcomes persists, with some patients receiving little benefit using the same devices that support high levels of speech reception for others. The purpose of this review is to describe some likely possibilities for further improvement, including (a) combined electric and acoustic stimulation of the auditory system for patients with significant residual hearing, (b) use of bilateral implants, (c) a closer replication with implants of the processing steps in the normal cochlea, and (d) applications of knowledge about factors that are correlated with outcomes to help patients presently at the low end of the performance scale.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.bioeng.5.040202.121645
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    The dynamics of magma withdrawal from a density stratified dyke
    Amsterdam : Elsevier
    Earth and Planetary Science Letters 85 (1987), S. 516-524 
    Details
    ISSN: 0012-821X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0012-821X(87)90145-2
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Comment on "Cooling and crystallization of lava in open channels, and the transition of pahoehoe lava to 'a'a" (2000)
    Springer
    Bulletin of volcanology 62 (2000), S. 362-364 
    Details
    ISSN: 1432-0819
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004450000090
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Better speech recognition with cochlear implants (1991)
    [s.l.] : Nature Publishing Group
    Nature 352 (1991), S. 236-238 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Features of the two strategies are illustrated in Figs 1 and 2. Both strategies use multiple monopolar electrodes to mimic crudely the tonotopic or 'place' coding of frequencies in the normal cochlea. In particular, high-frequency sounds are indi-cated by stimulating electrodes toward the base of ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/352236a0
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  • 7
    Electronic Resource
    Electronic Resource
    Evaluation of fasciotomy and vasodilator for treatment of frostbite in the dog
    Amsterdam : Elsevier
    Cryobiology 15 (1978), S. 659-669 
    Details
    ISSN: 0011-2240
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0011-2240(78)90091-3
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  • 8
    Electronic Resource
    Electronic Resource
    Nifedipine in the treatment of hypertension (1983)
    Springer
    European journal of clinical pharmacology 25 (1983), S. 713-715 
    Details
    ISSN: 1432-1041
    Keywords: nifedipine ; hypertension ; calcium antagonist ; plasma renin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary Nifedipine, a calcium antagonist with a predominant vasodilator action, was evaluated for the treatment of hypertension. A 20 mg-tablet, with a slower absorption and a more sustained blood-level than provided by the 10 mg-capsule was administered to 20 patients. The duration of the trial was 20 weeks. All patients achieved a significant reduction in both systolic (p〈0.05) and diastolic (p〈0.001) blood-pressure (B.P.), but 10 patients were withdrawn before completion of the trial period. Two patients, although achieving a fall in B.P. which was significant, did not reach to target level (〈160/90) on maximal dosage, one patient suffered a stroke due to a cerebral infarct, and seven patients were withdrawn because of side-effects due mainly to vasodilatation. The remaining 10 patients obtained a satisfactory response. In nine patients, who had achieved a satisfactory result, there was no change in plasma renin activity (P.R.A.) during chronic nifedipine administration.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00542507
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  • 9
    Electronic Resource
    Electronic Resource
    Field-induced forces at dielectric interfaces as a possible mechanism of RF hearing effects (1981)
    Springer
    Bulletin of mathematical biology 43 (1981), S. 401-413 
    Details
    ISSN: 1522-9602
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Mathematics
    Notes: Abstract A possible mechanism for effects of microwave radiation on the auditory system is the generation of field-induced forces at interfaces that divide materials of dissimilar electrical properties. A general expression for these “Maxwell stresses” is derived and then used to calculate the approximate magnitude of field-induced force within the organ of Corti during microwave exposure. Comparison of the results with data on the force needed to excite cochlear hair cells indicates auditory responses could be evoked by this mechanism at power densities near the threshold of rf hearing sensations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02459430
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  • 10
    Electronic Resource
    Electronic Resource
    Bestimmung des Titans und Zirkoniums, ihre Trennung von anderen Elementen sowie von einander (1924)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 65 (1924), S. 193-204 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01359279
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