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  • 1
    Electronic Resource
    Electronic Resource
    Graphical Tensile-Testing Machine for Rubber Threads (1931)
    s.l. : American Chemical Society
    Industrial and engineering chemistry 3 (1931), S. 218-221 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ac50074a042
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Global heat transfer analysis in Czochralski silicon furnace with radiation on curved specular surfaces (1999)
    Springer
    Heat and mass transfer 35 (1999), S. 185-190 
    Details
    ISSN: 1432-1181
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Numerical analysis of global heat transfer with coupled thermal radiation and heat conduction is investigated in Czochralski silicon crystal growth furnace with curved diffuse and specular surfaces. The finite element method and the radiation element method are adopted to solve the global heat transfer and the radiative heat exchange, respectively. The emphasis focuses on the discussion of the influence of silicon surface radiative characteristics, i.e., either diffuse or specular, on the global heat transfer and the crystal growth process. When the specular character of the silicon crystal and melt surfaces is considered, it is found that the temperature of the melt is obviously decreased and the crystal pulling rate is enhanced.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002310050312
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Automatic Problem Description from Model Program for Knowledge-based Programming Tutor (1997)
    Springer
    Automated software engineering 4 (1997), S. 439-461 
    Details
    ISSN: 1573-7535
    Keywords: program understanding ; template-based matching ; intelligent tutoring system ; problem description ; programming plans
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Notes: Abstract Knowledge-based programming tutors are supposed to analyze the students' programs using knowledge of the concepts of programming language, skills to build programs, misconceptions of novice programmers, and information about the programs to be analyzed. The last one provides the programming tutor with the intentions of programmers, and this allows the tutor to do an intention-based diagnosis (Johnson, 1996). This is given to the system in the form of a problem description by human instructors. However, it is very hard for instructors to write a problem description. For instructors, the simplest way to describe a problem may be to write a model program of that problem. This paper describes the system named GOES, a GOal Extraction System, which extracts the purposes (Goals) of a model program automatically. GOES is a susbsystem of C-Tutor, a knowledge-based C Programing Tutor (Hahn et al., 1996). GOES extracts implemented plans from a model program, and then extract goals from the plans according to goal/plan hierarchies. The efficiency of GOES depends on the process of plan extraction. In GOES, only pairs of labels and variables of each statement are used to extract candidate plans. Exact matching is followed only for theses candidate plans. In addition, to extract plans more efficiently, we introduce the concept of necessary and sufficient conditions of a plan to the model program. Using this method, plan candidates can be extracted efficiently and successfully.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008632729798
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Thermal Diffusivity Measurement of Two-Layer Optical Thin-Film Systems Using Photoacoustic Effect1 (2000)
    Springer
    International journal of thermophysics 21 (2000), S. 543-552 
    Details
    ISSN: 1572-9567
    Keywords: antireflection coating ; parameter estimation ; photoacoustic effect ; thermal diffusivity ; through-plane
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract In this study, we designed and developed two-layer antireflection (AR) optical coating samples on glass substrates, using different evaporation conditions of coating rates and substrate temperatures for two dielectric materials, MgF2 and ZnS, with different refractive indices. The through-plane thermal diffusivity of these systems was measured using the photoacoustic effect. The optical thicknesses of MgF2 and ZnS layers were fixed at 5λ/4 (λ=514.5 nm) and λ, respectively, and the thermal diffusivities of the samples were obtained from the measured amplitude of the photoacoustic signals by changing the chopping frequency of the Ar+ laser beam. The results demonstrated that the thermal diffusivity of the sample fabricated under the conditions of 10μÅ·s−1 and 150°C had the maximum value and that the results were directly related to the microstructure of the film system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006612403028
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Hepatocellular carcinoma despite long-term survival in chronic tyrosinaemia I (2000)
    Springer
    Journal of inherited metabolic disease 23 (2000), S. 791-804 
    Details
    ISSN: 1573-2665
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Tyrosinaemia I (fumarylacetoacetate hydrolase deficiency) is an autosomal recessive inborn error of tyrosine metabolism that produces liver failure in infancy or a more chronic course of liver disease with cirrhosis, often complicated by hepatocellular carcinoma, in childhood or early adolescence. We studied a 37-year-old woman with tyrosinaemia I whose severe liver disease in infancy and rickets during childhood resolved with dietary therapy. From 14 years of age she resumed an unrestricted diet with the continued presence of the biochemical features of tyrosinaemia, yet maintained normal liver function. In adult years she accumulated only small amounts of succinylacetone. Despite this evolution to a mild biochemical and clinical phenotype, she eventually developed hepatocellular carcinoma. Her fumarylacetoacetate hydrolase genotype consists of a splice mutation, IVS6−1g〉t, and a novel missense mutation, Q279R. Studies of resected liver demonstrated the absence of hydrolytic activity and of immunological expression of fumarylacetoacetate hydrolase in liver tumour. In nontumoral areas, however, 53% of normal hydrolytic activity and immunologically present fumarylacetoacetate hydrolase was found. This case demonstrates the high risk of liver cancer in tyrosinaemia I even in a seemingly favourable biological environment.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1026756501669
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    Paper (German National Licenses)
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