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  • 1
    Digitale Medien
    Digitale Medien
    FRIEDEL-CRAFTS COPOLYMERIZATION (1948)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 70 (1948), S. 4266-4267 
    Details
    ISSN: 1520-5126
    Quelle: ACS Legacy Archives
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1021/ja01192a519
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  • 2
    Digitale Medien
    Digitale Medien
    ACNE TREATED WITH A TOPICAL TETRACYCLINE PREPARATION: RESULTS OF A ONE-YEAR MULTI-GROUP STUDY (1978)
    Oxford, UK : Blackwell Publishing Ltd
    International journal of dermatology 17 (1978), S. 0 
    Details
    ISSN: 1365-4632
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: : One hundred five patients were treated effectively with topically applied tetracycline in an ethanol-water solution with n-decyl methyl sulfoxide, and observed for a year. Comedones and cystic lesions were least responsive to topical tetracycline. Side effects, which were minor, included yellow staining of facial skin and stinging after application. Two patients, one with juvenile diabetes and one with congenital nephritis, successfully used the preparation without adverse effects.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1365-4362.1978.tb06070.x
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  • 3
    Digitale Medien
    Digitale Medien
    ETIOLOGY OF A BIBLIOPHILE (1975)
    Oxford, UK : Blackwell Publishing Ltd
    International journal of dermatology 14 (1975), S. 0 
    Details
    ISSN: 1365-4632
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1365-4362.1975.tb01435.x
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  • 4
    Digitale Medien
    Digitale Medien
    Classification of binary document images into textual or nontextual data blocks using neural network models (1995)
    Springer
    Machine vision and applications 8 (1995), S. 289-304 
    Details
    ISSN: 1432-1769
    Schlagwort(e): Back propagation ; Document processing ; Probabilistic networks ; Radial basis function ; Self-organizing feature maps ; Textual classification
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Informatik
    Notizen: Abstract This paper describes a new method for the classification of binary document images as textual or nontextual data blocks using neural network models. Binary document images are first segmented into blocks by the constrained run-length algorithm (CRLA). The component-labeling procedure is used to label the resulting blocks. The features for each block, calculated from the coordinates of its extremities, are then fed into the input layer of a neural network for classification. Four neural networks were considered, and they include back propagation (BP), radial basis functions (RBF), probabilistic neural network (PNN), and Kohonen's self-organizing feature maps (SOFMs). The performance and behavior of these neural network models are analyzed and compared in terms of training times, memory requirements, and classification accuracy. The experiments carried out on a variety of medical journals show the feasibility of using the neural network approach for textual block classification and indicate that in terms of both accuracy and training time RBF should be preferred.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01211490
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  • 5
    Digitale Medien
    Digitale Medien
    Classification of binary document images into textual or nontextual data blocks using neural network models (1995)
    Springer
    Machine vision and applications 8 (1995), S. 289-304 
    Details
    ISSN: 1432-1769
    Schlagwort(e): Key words:Back propagation - Document processing - Probabilistic networks - Radial basis function - Self-organizing feature maps - Textual classification
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Informatik
    Notizen: Abstract. This paper describes a new method for the classification of binary document images as textual or nontextual data blocks using neural network models. Binary document images are first segmented into blocks by the constrained run-length algorithm (CRLA). The component-labeling procedure is used to label the resulting blocks. The features for each block, calculated from the coordinates of its extremities, are then fed into the input layer of a neural network for classification. Four neural networks were considered, and they include back propagation (BP), radial basis functions (RBF), probabilistic neural network (PNN), and Kohonen's self-organizing feature maps (SOFMs). The performance and behavior of these neural network models are analyzed and compared in terms of training times, memory requirements, and classification accuracy. The experiments carried out on a variety of medical journals show the feasibility of using the neural network approach for textual block classification and indicate that in terms of both accuracy and training time RBF should be preferred.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s001380050010
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  • 6
    Digitale Medien
    Digitale Medien
    Experimental study of copolymerization. II (1948)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 3 (1948), S. 157-166 
    Details
    ISSN: 0022-3832
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Physik
    Notizen: In order to study further the effect of structure on monomer reactivities in copolymerization the copolymer composition as a function of initial monomer mixture composition has been determined for the following monomer pairs: vinyl acetate-vinyl chloride, ethyl methacrylate-vinylidene chloride, butyl methacrylate-vinylidene chloride, vinyl acetate-tetrachloroethylene, allyl chloride-vinylidene chloride, vinyl acetate-vinylidenechloride, methyl methacrylate-vinyl chloride, pentene-1-vinyl chloride, allyl chloride-vinyl acetate, methyl methacrylate-2,5-di-chlorostyrene, vinyl chloride-vinylidene chloride, and vinyl chloride-dioctyl maleate.
    Zusätzliches Material: 7 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/pol.1948.120030202
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  • 7
    Digitale Medien
    Digitale Medien
    Determination of catalyst fragments in polymers by absorption in the ultraviolet (1946)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 1 (1946), S. 229-230 
    Details
    ISSN: 0022-3832
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/pol.1946.120010310
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  • 8
    Digitale Medien
    Digitale Medien
    Friedel-Crafts polymerizations. III. Medium effects in the Friedel-Crafts polymerization of styrene (1951)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 6 (1951), S. 725-732 
    Details
    ISSN: 0022-3832
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Physik
    Notizen: In polymerizing styrene at room temperature in the presence of tin tetrachloride, it is found that the rate of polymerization is greatly affected by the dielectric constant of the medium. It increases by a factor of approximately 1400 when the dielectric constant changes from 6.5 to 18.4. At the same time the degree of polymerization increases only slightly. The results are interpreted as supporting evidence for the mechanism of Friedel-Crafts polymerizations as suggested by Polanyi and co-workers. A unimolecular termination by proton-splitting cannot be reconciled with these results.Quantitative equations are derived relating the rate and degree of polymerization to the dielectric constant. Traces of liquid water have no visible effect on the polymerization while larger amounts cause retardation. The degree of polymerization, which is of the order of 20, does not change with conversion and is unaffected by the catalyst present.
    Zusätzliches Material: 3 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/pol.1951.120060607
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  • 9
    Digitale Medien
    Digitale Medien
    A color reaction involving vinyl chloride containing polymers and pyridinePresented before the Division of Polymer Chemistry at the 122nd meeting of the American Chemical Society; Atlantic City, New Jersey, September, 1952. (1953)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 11 (1953), S. 233-242 
    Details
    ISSN: 0022-3832
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Physik
    Notizen: When a dilute pyridine solution of vinyl chloride polymers or copolymers is heated and a few drops of alcoholic hydroxide are added to the hot solution, a dark brown color develops. The response of vinyl chloride polymers in this reaction is much more intense than that of most other organic compounds, probably due to the conjugated double bonds produced in the main chain through the loss of hydrogen chloride. In addition to straight degradation of the polymer, the formation of an isocyanine dye is suggested by a mechanism which, besides pyridine and the polymer, involves the alkali alkoxide as a reactant.
    Zusätzliches Material: 1 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/pol.1953.120110306
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