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  • 1
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 86 (1999), S. 3885-3889 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Five layered Sr2Bi4Ti5O18 has been prepared in the ceramic form with a view to studying its electrical properties. X-ray and microstructural studies were employed for physical characterization. Detailed electrical property measurements were undertaken so as to understand the basic transport physics of this compound. The results of dielectric studies, dc conductivity, and ac impedance are discussed, and a defect formula for Sr2Bi4Ti5O18 has been proposed. The investigations on this material at high temperatures and frequencies reveal its stable behavior. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 52 (1996), S. 88-90 
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: The Debye–Waller factors of the rubidium halides obtained from different theoretical models are critically compared with recent experimental data. The results from the model adopted by Govindarajan [Acta Cryst. (1973), A29, 576–577] seem to be in better agreement with experimental values than those from other models. The Debye temperatures calculated from the Debye–Waller factors are compared with those from specific heats. A modification recently suggested by Homing & Staudenmann [Acta Cryst. (1988), A44, 136–142] for the evaluation of the Debye temperature from Debye–Waller factors does not improve the agreement between the two sets.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Bradford : Emerald
    Journal of consumer marketing 15 (1998), S. 32-43 
    ISSN: 0736-3761
    Source: Emerald Fulltext Archive Database 1994-2005
    Topics: Economics
    Notes: Some brand strategists have distinguished between symbolic and functional brands, i.e. brands that basically satisfy consumers' functional or product-related needs and brands bought to enhance self- or social esteem. It has been suggested that brands should be positioned as either functional or symbolic but not both. However, empirical research on the dimensionality of brand symbolism/functionality has been lacking. In this study, scales were developed to assess a brand's symbolic or functional association with consumers. Subsequent data analysis suggests that brand symbolism and functionality are separate phenomena and, further, that symbolism comprises two dimensions, termed prestige and personality expression. Thus, contrary to current thinking, it seems that brands can be successfully positioned as both symbolic and functional and, if a symbolic brand concept is desired, prestige or upscaleness is just one of the possible positioning options available.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1573-0581
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    International ophthalmology 22 (1998), S. 201-206 
    ISSN: 1573-2630
    Keywords: conjunctival membranes ; histopathology ; ligneous conjunctivitis ; treatment
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The clinical, histopathologic features, and treatment outcomes in 3 patients with ligneous conjunctivitis are described. Bilateral, idiopathic membranes occurred in the palpebral conjunctiva in 2 patients. In 1 patient, unilateral conjunctival changes occurred in the bulbar conjunctiva, at the site of pterygium excision. Treatment included topical hyaluronidase, chymotrypsin, heparin, and cyclosporine and surgical excision with limited or no success. In one patient, conjunctival autografting from the normal fellow eye resulted in pseudomembrane formation at the donor site in the previously unaffected eye. Histopathological evaluation of excised membranes revealed the presence of amorphous eosinophilic hyaline material and chronic inflammatory cells. Immunohistochemical study revealed a predominance of T-lymphocytes. This case series confirms the recalcitrant clinical course of ligneous conjunctivitis. Conventional treatment modalities described in literature were not useful in the management of this condition. Surgical manipulation of the unaffected fellow eye in patients with unilateral disease can result in pathologic conjunctival changes, and is best avoided.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1573-2630
    Keywords: bilateral penetrating keratoplasty ; corneal graft failure ; endothelial rejection ; review
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Purpose: To analyze the indications, functional results, and rates of graft rejection and failure after bilateral penetrating keratoplasty (PK) in a major eye care hospital and research center in India. Methods: Retrospective review of the case records of 38 patients who underwent bilateral PK and had at least 6 months follow-up after cornealtransplantation in the second eye. Results: The mean age of the 38 patients (20 M, 18 F) was 35 ± 25 years (range, 0.5 to 79 years). Mean follow-up was 49 ± 23 months (range, 13.4 to 116.4 months) after surgery in the first eye and 31 ± 22 months (range, 6.6 to 103.6 months) after surgery in the second eye. The average time interval between surgery in the first and second eye was 18 ± 10 months (range, 0 to 38 months). The commonest indications for surgery were corneal dystrophies (50%),aphakic bullous keratopathy (21%), and keratoconus (11%). Postoperatively, secondary glaucoma occurred in 2 first and 3 second eyes. Best-corrected visual acuity at last follow-up was 〉 6/12 in 34% of first eyes and 50% of second eyes, and was 〉 6/60 in 26% and 18% of first and second eyes respectively. Allograft rejection occurred in 4 of the first eyes and 3 of the second eyes. The two-year graft survival rate in first eyes was 70% and in second eyes was 83%. Worse outcomes were noted in grafts performed for secondary endothelial failure. Earlier graft failure occurred in first eyes (54 ± 5 months) compared to second eyes (79 ± 10 months) (Logrank Test p = 0.2311).Conclusions: Bilateral penetrating keratoplasty has reasonable success in selected patients. Corneal transplantation in the second eye does not seem to increase the risk of graft rejection in either eye.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Agriculture and human values 13 (1996), S. 78-85 
    ISSN: 1572-8366
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Agriculture and human values 13 (1996), S. 62-74 
    ISSN: 1572-8366
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Chichester : Wiley-Blackwell
    International Journal for Numerical Methods in Fluids 22 (1996), S. 121-135 
    ISSN: 0271-2091
    Keywords: spatial marching methods ; reduced Navier-Stokes equations ; explicit methods ; Runge-Kutta method ; hypersonic flow ; supersonic flow ; Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: This paper develops a spatial marching method for high-speed flows based on a finite volume approach. The method employs the reduced Navier- Stokes equations and a pressure splitting in the streamwise direction based on the Vigneron strategy. For marching from an upstream station to one downstream the modified five-level Runge-Kutta integration scheme due to Jameson and Schmidt is used. In addition, for shock handling and for good convergence properties the method employs a matrix form of the artificial dissipation terms, which has been shown to improve the accuracy of predictions. To achieve a fast rate of convergence, a local time-stepping concept is used. The method retains the time derivative in the governing equations and the solution at every spatial station is obtained in an iterative manner.The developed method is validated against two test cases: (a) supersonic flow past a flat plate; and (b) hypersonic flow past a compression corner involving a strong viscous-inviscid interaction. The computed wall pressure and wall heat transfer coefficients exhibit good general agreement with previous computations by other investigators and with experiments.
    Additional Material: 14 Ill.
    Type of Medium: Electronic Resource
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