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  • 1
    Digitale Medien
    Digitale Medien
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 64 (1993), S. 3053-3060 
    ISSN: 1089-7623
    Quelle: AIP Digital Archive
    Thema: Physik , Elektrotechnik, Elektronik, Nachrichtentechnik
    Notizen: Current sources in the human body can be localized by measuring the biomagnetic fields with multichannel SQUID systems. Important system aspects are the noise level, the ambient field suppression, the dynamic range, the reliability, the number of channels, and the arrangement of gradiometers. From the user's point of view the most important quality factor is the accuracy with which a current dipole can be localized. A test procedure is proposed to determine the localization power of the system. A 31-channel-SQUID system is presented together with the results of the test. The crucial parts of the system determining the accuracy are pointed out.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 95 (1991), S. 7074-7085 
    ISSN: 1089-7690
    Quelle: AIP Digital Archive
    Thema: Physik , Chemie und Pharmazie
    Notizen: Light scattering in a viscoelastic liquid is studied. The change from liquid to solid-like Brillouin spectra is explained using frequency dependent elasto-optic constants. Within a standard dielectric model microscopic formulas for these generalized frequency dependent constants and the spectra are obtained. The phenomenological pictures of light scattering in an amorphous solid and in a liquid are obtained as high and low frequency limits. The observation of a Rytov Dip in a system of optically isotropic particles is predicted for slow enough viscoelastic relaxation. Approximations using the Mode Coupling Theory allow the spectra to be expressed in terms of density fluctuations alone. The predictions of this theory for the spectra are discussed.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    ISSN: 1365-2044
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: Until recently, the most appropriate technique of intubating a patient with a cervical spine injury has been the subject of debate. Tracheal intubation by means of the intubating laryngeal mask (Fastrach™), a modified conventional laryngeal mask airway, seems to require less neck manipulation. The aim of this study was to compare the excursion of the upper cervical spine during tracheal intubation using direct laryngoscopy with that during intubation via the laryngeal mask (Fastrach™), by examination of lateral cervical spine radiographs in healthy young patients. The intubating laryngeal mask (Fastrach™) caused less extension (at C1−2 and C2−3) than intubation by direct laryngoscopy. Direct laryngoscopy is still the fastest method to secure an airway provided no intubating difficulties are present. However, in trauma patients requiring rapid sequence induction and in whom cervical spine movement is limited or undesirable, the intubating laryngeal mask (Fastrach™) is a safe and fast method by which to secure the airway.
    Materialart: Digitale Medien
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  • 4
    Digitale Medien
    Digitale Medien
    Oxford, UK : Blackwell Science, Ltd
    Plant, cell & environment 25 (2002), S. 0 
    ISSN: 1365-3040
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Biologie
    Notizen: The effects of soil moisture distribution on water uptake of drip-irrigated corn were investigated by simultaneously monitoring the diurnal evolution of sap flow rate in stems, of leaf water potential, and of soil moisture, during intervals between successive irrigations. The results invalidate the steady-state resistive flow model for the continuum. High hydraulic capacitance of wet soil and low hydraulic conductivity of dry soil surrounding the roots damped significantly diurnal fluctuations of water flow from bulk soil to root surface. By contrast, sap flow responded directly to the large diurnal variation of leaf water potential. In wet soil, the relation between the diurnal courses of uptake rates and leaf water potential was linear. Water potential at the root surface remained nearly constant and uniformly distributed. The slope of the lines allowed calculating the resistance of the hydraulic path in the plant. Resistances increased in inverse relation with root length density. Soil desiccation induced a diurnal variation of water potential at the root surface, the minimum occurring in the late afternoon. The increase of root surface water potential with depth was directly linked to the soil desiccation profile. The development of a water potential gradient at the root surface implies the presence of a significant axial resistance in the root hydraulic path that explains why the desiccation of the soil upper layer induces an absolute increase of water uptake rates from the deeper wet layers.
    Materialart: Digitale Medien
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  • 5
    Digitale Medien
    Digitale Medien
    Oxford, UK : Munksgaard International Publishers
    Contact dermatitis 46 (2002), S. 0 
    ISSN: 1600-0536
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: Tacrolimus (FK 506) is a macrolide discovered in 1984 as a metabolic product of Streptomyces tsukabaensis. It has been used successfully in treating atopic dermatitis, allergic contact dermatitis, lichen planus mucosae and pyoderma gangrenosum. In the present study, we evaluated the anti-inflammatory activity of FK 506 in 2 human skin inflammation models. FK 506 as Protopic® cream was tested (i) in a 4-day repetitive irritation test with 2 × daily application of sodium lauryl sulphate (SLS), and (ii) in a UVB erythema model. The effect was evaluated visually and quantified by non-invasive bioengineering methods, namely chromametry and tewametry (TEWL). When FK 506 was applied 30 min after SLS irritation, an increased inflammation in comparison to controls was observed with all 3 methods, with only the TEWL data reaching statistical significance. 1 × daily application of FK 506 for 5 days, starting at the end of the 4-day irritation period, was without any effect. Similarly, no effect of FK 506 was seen in the UVB model. In conclusion, FK 506 was shown to enhance experimentally induced irritant contact dermatitis and not to accelerate healing of irritant contact dermatitis and UVB erythema.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 6
    ISSN: 1433-0458
    Schlagwort(e): Schlüsselwörter Telemedizin ; Videokonferenz ; Telekonsultation ; Minimal-invasive Chirurgie ; ISDN ; Keywords Telemedicine ; Videoconference ; Teleteaching ; Minimal invasive surgery ; ISDN
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Beschreibung / Inhaltsverzeichnis: Abstract “Telemedicine” is a major new development with great potential for improving health care delivery. It therefore affects each department in medicine. There is a great deal of telemedicine activity around the world. However, the term telemedicine is not clear. It describes all forms of medical information, transferred from a relevant distance by an electronic transfer media. An essential condition for communication is the intelligibility between transmitter and receiver. Because of different transmitting technologies and networks in distinct countries, towns, or even academic institutions, satisfactory contact is not possible. In the last decade, the demand for worldwide audiovisual data transmission has led to the standardization of telecommunication media. Therefore it is no longer necessary to transport medical data (or even patients) by conventional manners, e.g., post, car, or aircraft. Telemedicine for diagnosis and management can be bidirectional in real-time, long-distance videoconferencing, in which the patient consults a specialist located at the remote site, or it can be the transmission of either real-time or pre-recorded images and data to a remote expert, as in teleradiology or telepathology. Another application is the use of videoconference systems in the course of meetings. The remote specialist has the opportunity to take part in the session, e.g., with a lecture. Furthermore, the remote specialist can demonstrate special operative techniques for teleteaching purposes, some of which may be specialities of the particular medical unit, e.g., operation in open NMR, telemanipulation, or telerobotic procedures. In this paper, we describe the use and benefit of a videoconference between the departments of otolaryngology and head and neck surgery of the Universities of Tübingen and Leipzig by means of an “ISDN-based videoconference system”. During the meeting, the “operating course for reconstructive surgery in the head and neck”, the practicability, reliability, costs and quality were determined and compared with other technologies for audiovisual data transfer.
    Notizen: Zusammenfassung Der Begriff “Telemedizin” umschreibt eine Summe von Entwicklungen, die mit einem großen Telekommunikationspotential zur flächendeckenden Krankenversorgung beitragen und somit mittlerweile jeden medizinischen Fachbereich berühren. Den verschiedenen Anwendungsgebieten ist in der Definition folgender Aspekt gemeinsam: der Transfer aller Formen von medizinischer Information über eine relevante räumliche Distanz mittels moderner Datenübertragungstechnologien. Wesentliche Bedingung zur Kommunikation ist die Möglichkeit der Verständigung zwischen Sender und Empfänger. In den letzten Jahren hat der Bedarf nach weltweitem Datenaustausch eine zunehmende Standardisierung und Kompatibilität der verschiedenen Übertragungstechnologien mit sich gebracht und erlaubt nun einen Datentransfer auf kurzem Wege (z. B. ISDN-Technologie, Internet). In der Medizin bedeutet dies, dass in speziellen Fragestellungen Befunde/Patienten nicht mehr konventionell per Bote, Post oder Verkehrsmittel zum Arzt gelangen, sondern z. B. mittels einer audiovisuellen Übertragung über ein Telekommunikationsmedium, bei der der Zugang auf die benötigte Information (z. B. Gespräch zwischen Patient und Spezialist, endoskopischer Befund) in der Regel bidirektional hergestellt wird (Telekonsultation). Ein weiterer Ansatzpunkt ist der Einsatz bei Tagungen in Form von Videokonferenzen. Hierbei besteht die Möglichkeit, entfernt lokalisierte Spezialisten mittels audiovisueller Übertragung in die Tagung (z. B. Vortrag, Rundtischgesprächen) mit einzubeziehen. In operativen Fächern können z. B. bestimmte Operationstechniken den Tagungsteilnehmern demonstriert werden und somit den Weiterbildungscharakter im Sinne des Teleteaching unterstützen. Im Rahmen eines “Operationskurses zur rekonstruktiven Chirurgie im Kopf-Hals-Bereich” zwischen den Universitätskliniken Tübingen-Leipzig führten wir eine Videokonferenzübertragung mitttels “ISDN-basierendem Videokonferenzsystem” durch. Praktikabilität, Zuverlässigkeit, Kostenaspekt und Qualität wurden ermittelt und im folgenden mit anderen audiovisuellen Übertragungstechnologien diskutiert.
    Materialart: Digitale Medien
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  • 7
    facet.materialart.
    Unbekannt
    Paris : Periodicals Archive Online (PAO)
    Revue de littérature comparée. 6 (1926) 115 
    ISSN: 0035-1466
    Thema: Allgemeine und vergleichende Sprach- und Literaturwissenschaft. Indogermanistik. Außereuropäische Sprachen und Literaturen
    Notizen: Notes et documents
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 8
    facet.materialart.
    Unbekannt
    Paris : Periodicals Archive Online (PAO)
    Etudes anglaises. 45:2 (1992:avril/juin) 212 
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 9
    facet.materialart.
    Unbekannt
    Paris : Periodicals Archive Online (PAO)
    Etudes anglaises. 46:3 (1993:juil./sept.) 352 
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 10
    facet.materialart.
    Unbekannt
    Paris : Periodicals Archive Online (PAO)
    Etudes anglaises. 46:2 (1993:avril/juin) 224 
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