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  • Articles: DFG German National Licenses  (6)
  • Electronic Resource  (6)
  • 1980-1984  (4)
  • 1975-1979  (2)
Source
  • Articles: DFG German National Licenses  (6)
Material
  • Electronic Resource  (6)
Years
Year
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    Waste controls at base metal mines (1976)
    s.l. : American Chemical Society
    Environmental science & technology 10 (1976), S. 130-135 
    Details
    ISSN: 1520-5851
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/es60113a011
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Recent developments in optical storage technology (1982)
    [s.l.] : Nature Publishing Group
    Nature 297 (1982), S. 104-106 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] RESEARCH and development in the field of high-density optical data storage media and devices continue to move forward at a brisk pace - in the eighteen months since last reviewed in these columns1, several companies have committed themselves to development efforts and the introduction of commercial ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/297104a0
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Choice of operation in verbal problems with decimal numbers (1981)
    Springer
    Educational studies in mathematics 12 (1981), S. 399-420 
    Details
    ISSN: 1573-0816
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract This article examines the conceptual problems that children experience when attempting to solve verbal problems which contain decimal numbers. After discussing the existing research, we then describe an experiment that was designed in three phases: 1. Exploratory interviews to discover existing conceptions and difficulties and to discover how pupils made use of diagrams, simpler numbers, and strategies. These interviews exposed difficulties with the understanding of place value, the effect of multiplying and dividing by a positive number less than one, the symbolisms of division and its noncommutative nature, the units associated with the numbers and also with familiar names for the operations. The three strategies were all found to be unfamiliar to pupils and their difficulties are discussed. 2. The design and administration of a diagnostic test, based on the results of these interviews, to a class of less able 14 year olds. 3. The preparation and use of calculator enriched teaching materials designed to remedy the identified misconceptions. From the pre- and post-test results we note the dramatic success of the teaching in improving pupils' understanding of place value, although there is a more modest improvement in enabling pupils to choose the correct operation by drawing diagrams, using easier numbers and estimating.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00308139
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Choice of operation in verbal arithmetic problems: the effects of number size, problem structure and context (1984)
    Springer
    Educational studies in mathematics 15 (1984), S. 129-147 
    Details
    ISSN: 1573-0816
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract 12-and 13-year-olds were tested with two types of tasks to test their understanding of applications of the multiplication and division of positive numbers: (i) writing down calculations required to solve verbal problems, and (ii) making up stories to fit given calculations. Selected pupils were interviewed to investigate further the thinking processes involved. The results indicate (a) the pervasive nature of certain numerical misconceptions, (b) the effects of structural differences among the items; particularly whether multiplication can be conceived as repeated addition or not, and whether division has the structure of partition, quotition or rate, (c) specific effects of context attributable to such aspects as relative familiarity, and (d) various interactions between these three sets of factors.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00305893
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Research in homosexuality: Back to the drawing board (1975)
    Springer
    Archives of sexual behavior 4 (1975), S. 421-431 
    Details
    ISSN: 1573-2800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Psychology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01541725
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    The 15N NMR spectra of macrocyclic compounds containing the ferrocene unit (1981)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 15 (1981), S. 94-95 
    Details
    ISSN: 0030-4921
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The synthesis of a 15N enriched macrocycle containing the ferrocene unit is descibed, and the 15N NMR spectra of the macrocycle and those of its complexes with some metallic cations are reported.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1270150119
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    Paper (German National Licenses)
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