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  • 1
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    Modern Small Industry for Developing Countries - A Paradox in Planning Economics (1967)
    Chicago : Periodicals Archive Online (PAO)
    Economic development and cultural change. 15:3 (1967:Apr.) 341 
    Details
    ISSN: 0013-0079
    Topics: Geography , Economics
    Notes: "REVIEW ARTICLES"
    URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:5112-1967-015-03-000010
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  • 2
    Electronic Resource
    Electronic Resource
    DNA sequence of a class I pseudogene from theTla region of the murine MHC: Recombination at a B2 Alu repetitive sequence (1989)
    Springer
    Journal of molecular evolution 28 (1989), S. 306-312 
    Details
    ISSN: 1432-1432
    Keywords: Thymus leukemia antigen ; Pseudogene ; B2 Alu repeat ; Recombination
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary We have determined the DNA sequence of a BALB/cTla region class I gene from the major histocompatibility complex (MHC) that had been identified previously as encoding a murine antigen by DNA-mediated gene transfer. Analysis of the DNA sequence shows, however, that this gene, the T1c gene from theTla c genotype, could not encode a TL antigen or any other functional class I molecule due to the presence of numerous stop codons and frameshift mutations in the coding regions. This result suggests that the earlier transformation data may have been incorrect or perhaps that the clone containing the T1c gene contains sequences that induced expression of a serologically reactiveTla gene in the genome of the recipient L cell. The T1c gene is structurally related to the previously sequenced T13c gene that encodes a serologically defined TL antigen. The 3′ half of the T1c gene including exons 4, 5, 6, and the 3′ untranslated region has about 85% nucleotide similarity (including introns) with the corresponding parts of the T13c gene; however, the 5′ half of the T1c gene has little homology with the T13c gene. There is a sharp line of demarcation between the homologous and nonhomologous regions, and this border occurs precisely at a B2 Alu repeat sequence present in the T13c gene. This suggests that a recombination event took place here and that an Alu repeat sequence that is known to have characteristics of transposable elements played some role in a recombination or gene conversion event.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02103426
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  • 3
    Electronic Resource
    Electronic Resource
    Knowledge Acquisition Via Incremental Conceptual Clustering (1987)
    Springer
    Machine learning 2 (1987), S. 139-172 
    Details
    ISSN: 0885-6125
    Keywords: Conceptual clustering ; concept formation ; incremental learning ; inference ; hill climbing
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Notes: Abstract Conceptual clustering is an important way of summarizing and explaining data. However, the recent formulation of this paradigm has allowed little exploration of conceptual clustering as a means of improving performance. Furthermore, previous work in conceptual clustering has not explicitly dealt with constraints imposed by real world environments. This article presents COBWEB, a conceptual clustering system that organizes data so as to maximize inference ability. Additionally, COBWEB is incremental and computationally economical, and thus can be flexibly applied in a variety of domains.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1022852608280
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  • 4
    Electronic Resource
    Electronic Resource
    Knowledge acquisition via incremental conceptual clustering (1987)
    Springer
    Machine learning 2 (1987), S. 139-172 
    Details
    ISSN: 0885-6125
    Keywords: Conceptual clustering ; concept formation ; incremental learning ; inference ; hill climbing
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Notes: Abstract Conceptual clustering is an important way of summarizing and explaining data. However, the recent formulation of this paradigm has allowed little exploration of conceptual clustering as a means of improving performance. Furthermore, previous work in conceptual clustering has not explicitly dealt with constraints imposed by real world environments. This article presents COBWEB, a conceptual clustering system that organizes data so as to maximize inference ability. Additionally, COBWEB is incremental and computationally economical, and thus can be flexibly applied in a variety of domains.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00114265
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  • 5
    Electronic Resource
    Electronic Resource
    Nucleotide sequence of the BALB/c H-2T region gene, T3 d (1992)
    Springer
    Immunogenetics 36 (1992), S. 326-332 
    Details
    ISSN: 1432-1211
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00215662
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  • 6
    Electronic Resource
    Electronic Resource
    Expression of theQ8/9 d gene by T cells of the mouse (1989)
    Springer
    Immunogenetics 30 (1989), S. 156-161 
    Details
    ISSN: 1432-1211
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract TheQ genes, specifying Qa antigens and situated in the extended part of the major histocompatibility complex (MHC) of the mouse, comprise a subgroup of MHC class I genes whose significance and function are still largely unknown. In screening a cDNA library made from the BALB/c inducer T-cell line Cl.Ly1-T1, we isolated 11 clones representingQ8/9, but none representingQ6 orQ7. Confirmatory evidence is given that theQ8/9 gene originated from fusion of the 5′ region of theQ8 gene with the 3′ region of theQ9 gene at a recombination site or hot spot in the vicinity of intron 4. Contrary to previous impressions thatQ8/9 is an inert pseudogene, we find that theQ8/9 gene can be functional and encode a Qa-2,3 antigen. One variety of the 11 Q8/9 clones isolated lacked exon 5, which encodes the transmembrane domain of class I glycoproteins, and thus may account for secretion of a soluble form of Qa-2,3 antigen thought to be released by activated T cells.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02421200
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  • 7
    Electronic Resource
    Electronic Resource
    Transcripts of Tla genes (1987)
    Springer
    Immunogenetics 25 (1987), S. 411-415 
    Details
    ISSN: 1432-1211
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00396109
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  • 8
    Electronic Resource
    Electronic Resource
    Use of Magnetic Resonance Imaging as a Tool for the Study of Foamy Oil Behavior for an Extra‐Heavy Crude Oil. T2 /Viscosity Correlation with Respect to Pressure (1999)
    Springer
    Transport in porous media 35 (1999), S. 189-204 
    Details
    ISSN: 1573-1634
    Keywords: MRI ; foamy oil ; maps ; T2 ; viscosity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Technology
    Notes: Abstract The purpose of this work is to present the results of the phase behavior study for a live heavy oil during a pressure depletion process using magnetic resonance imaging (MRI) as a tool to characterize foamy oil phenomena. The experiments were carried out in the pressure range of 13.1 to 1.4 MPa. Signal intensity images were obtained at each pressure and with respect to time, that is, approximately for a total time of 3 h after each pressure change. It is possible to see a variation in intensity across the sample. These changes can be associated with changes in mobility as well as segregation of the oil. It was also possible to observe that what we trust is the formation of gas channels at the last two pressure values, as it comes out of solution. A correlation between the transverse relaxation time T2 and temperature was established with the aim of producing one between T2 and viscosity. In this way viscosity maps for the live oil were obtained as a function of pressure and time. It was observed that above the bubble point, the viscosity maps varied from low to high to low with respect to time for the same pressure. Below the bubble point the situation is reverse. The viscosity map changes from high to low to high with respect to time for the same pressure. The study shows the potential use of MRI to follow viscosity changes during pressure depletion test in a PVT MRI cell.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006578105518
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  • 9
    Electronic Resource
    Electronic Resource
    Statistical guidance in symbolic learning (1990)
    Springer
    Annals of mathematics and artificial intelligence 2 (1990), S. 135-147 
    Details
    ISSN: 1573-7470
    Keywords: Machine learning ; learning from examples ; conceptual clustering ; explanation-based learning
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mathematics
    Notes: Abstract Concept learning methods of Artificial Intelligence (AI) are usefully guided by statistical measures of concept quality. We review the application of statistical measures intutored methods oflearning from examples, describe the recent application of these measures toconceptual clustering, and propose statistical applications inexplanation-based learning.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01531002
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  • 10
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    Frequency-dependent landscape response to climatic forcing (2013)
    Wiley
    Details
    Publication Date: 2013-02-26
    Description: [1]  Whereas the existence of pronounced orbitally-controlled periodicities is a major feature of Earth climate, its impact on landscape dynamics remains poorly understood. We use a Landscape Evolution Model (LEM) to systematically investigate the response of landscapes to a range of periodic oscillations in precipitation. The resulting sediment-flux evolution displays a pronounced sensitivity to the period of the input precipitation signal, such that, for a given erodibility, a specific periodicity maximizes the amplitude of the response. This optimal period of “resonance” scales as the inverse of the erodibility, but is progressively filtered out of the response when the intensity of hillslope diffusion increases. This frequency-dependent landscape behavior displayed by our model provides a mechanistic perspective on Molnar's [2004] proposition that ubiquitous changes in Late Cenozoic continental denudation could result directly from modifications in the spectral content of the climatic signal.
    Print ISSN: 0094-8276
    Electronic ISSN: 1944-8007
    Topics: Geosciences , Physics
    Published by Wiley on behalf of American Geophysical Union (AGU).
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