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  • 1
    Electronic Resource
    Electronic Resource
    Using latent semantic indexing for multilanguage information retrieval (1995)
    Springer
    Computers and the humanities 29 (1995), S. 413-429 
    Details
    ISSN: 1572-8412
    Keywords: Bible ; English ; Gospels ; Greek ; Hebrew ; information retrieval ; latent semantic indexing ; singular value decomposition
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Media Resources and Communication Sciences, Journalism
    Notes: Abstract In this paper, a method for indexing cross-language databases for conceptual query matching is presented. Two languages (Greek and English) are combined by appending a small portion of documents from one language to the identical documents in the other language. The proposed merging strategy duplicates less than 7% of the entire database (made up of different translations of the Gospels). Previous strategies duplicated up to 34% of the initial database in order to perform the merger. The proposed method retrieves a larger number of relevant documents for both languages with higher cosine rankings when Latent Semantic Indexing (LSI) is employed. Using the proposed merge strategies, LSI is shown to be effective in retrieving documents from either language (Greek or English) without requiring any translation of a user's query. An effective Bible search product needs to allow the use of natural language for searching (queries). LSI enables the user to form queries with using natural expressions in the user's own native language. The merging strategy proposed in this study enables LSI to retrieve relevant documents effectively using a minimum of the database in a foreign language.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01829874
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  • 2
    Electronic Resource
    Electronic Resource
    Corrigendum: Speed-ups by changing the order in which sets are enumerated (1973)
    Springer
    Theory of computing systems 7 (1973), S. 352-352 
    Details
    ISSN: 1433-0490
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01890610
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  • 3
    Electronic Resource
    Electronic Resource
    A note on dense and nondense families of complexity classes (1971)
    Springer
    Theory of computing systems 5 (1971), S. 66-70 
    Details
    ISSN: 1433-0490
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Notes: Abstract In a model for a measure of computational complexity, Ф, for a partial recursive functiont, letR t Ф denote all partial recursive functions having the same domain ast and computable within timet. Let ΣФ = {R t Ф |t is recursive} and let ΩФ = { $$R_{\Phi _i } $$ |Фi is actually the running time function of a computation}. ΣФ and ΩФ are partially ordered under set-theoretic inclusion. These partial orderings have been extensively investigated by Borodin, Constable and Hopcroft in [3]. In this paper we present a simple uniform proof of some of their results. For example, we give a procedure for easily calculating a model of computational complexity Ф for which ΣФ is not dense while ΩФ is dense. In our opinion, our technique is so transparent that it indicates that certain questions of density are not intrinsically interesting for general abstract measures of computational complexity, Ф. (This is not to say that similar questions are necessarily uninteresting for specific models.)
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01691468
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  • 4
    Electronic Resource
    Electronic Resource
    Speed-Ups by changing the order in which sets are enumerated (1971)
    Springer
    Theory of computing systems 5 (1971), S. 148-156 
    Details
    ISSN: 1433-0490
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Notes: Abstract The purpose of this paper is to show that there are sets for which really large improvements in enumeration times can only be achieved by programs which change the order in which the sets are enumerated and not by programs which merely speed up the enumeration times without changing the order in which the sets are enumerated. We do this by proving, in a suitably general context, the following analogue of the Blum speedup theorem: There are some infinite sets which are so difficult to enumerate that, given any order for enumerating the set, there is some other order and someone method of enumerating the set in this second order which is much faster thanany method of enumerating the set in the first ordering. The proof itself is one of the first nontrivial applications of priority methods to questions of computational complexity. (See also [8], [6], and [3] for more such applications.)
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01702871
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  • 5
    Electronic Resource
    Electronic Resource
    Phenylalanine and tyrosine transfer RNAs encoded by Tetrahymena pyriformis mitochondrial DNA: primary sequence, post-transcriptional modifications, and gene localization (1985)
    Springer
    Current genetics 9 (1985), S. 389-393 
    Details
    ISSN: 1432-0983
    Keywords: Tetrahymena ; Mitochondria ; tRNA ; Sequences
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary We have isolated Phe and Tyr tRNAs from Tetrahymena pyriformis mitochondria and have determined that these are “native” species, encoded by the mtDNA. A single gene for the tRNAPhe has been positioned 12–14 kbp from the left end of the linear Tetrahymena mtDNA, while duplicate tRNATyr genes have been localized within the inverted terminal repeats of this genome. Primary sequence analysis demonstrates that the tRNATyr has all of the characteristic primary and secondary structural features of a normal tRNA; however, the tRNAPhe displays several atypical features, including (i) replacement of the usual Tψ sequence by UC, (ii) a U - U pair in the TψC stem, and (iii) an extra 5′-nucleotide (U).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00421610
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  • 6
    Electronic Resource
    Electronic Resource
    Phenylalanine and tyrosine transfer RNAs encoded byTetrahymena pyriformis mitochondrial DNA: primary sequence, post-transcriptional modifications, and gene localization (1985)
    Springer
    Current genetics 9 (1985), S. 698-698 
    Details
    ISSN: 1432-0983
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00449824
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  • 7
    Electronic Resource
    Electronic Resource
    Physiological consequences of expression of the Na+/H+ antiporter sod2 in Escherichia coli (1998)
    Springer
    Molecular and cellular biochemistry 183 (1998), S. 125-132 
    Details
    ISSN: 1573-4919
    Keywords: fission yeast ; Na+/H+ antiporter ; Escherichia coli ; expression ; lithium resistance
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Abstract Sod2 is the sodium-proton antiporter on the plasma membrane of the fission yeast Schizosaccharomyces pombe. It is vitally important for sodium export and pH homeostasis in this organism. Recently, the sod2 gene has been cloned and sequenced. However, initial attempts to express sod2 in Escherichia coli using the T7 promoter failed. In the present work we examined physiological consequences of expression of sod2 in E. coli. To alleviate problems caused by expression of sod2 we: (i) used sodium-free media at all steps; (ii) used the moderate tac promoter for expression and; (iii) used E. coli strain MH1 which has impaired sodium exchange. The effect of sod2 expression on E. coli varied depending on the E. coli genotype. When sod2 was expressed in BL21 cells which have normal N a+/H+ antiporters, the result was a Li+ sensitive phenotype. LiCl completely arrested or prevented growth of BL21 E. coli transformed with the sod2 gene. The effect on growth was pronounced in media of low external pH. Sod2 was then expressed in E. coli MH1 which is devoid of endogenous Na+/H+ antiporters. These cells became more resistant to external LiCl, but only in Na+ containing media. In the absence of external Na+, the presence of sod2 reduced growth. The results are explained in a model which demonstrates the physiological consequences of interference by expression of a foreign electroneutral Na+/H+ antiporter in conjunction with different housekeeping systems of E. coli host cells.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006801104502
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  • 8
    Electronic Resource
    Electronic Resource
    Long-range steric effects on rotational barriers in peptide chains (1975)
    New York : Wiley-Blackwell
    Biopolymers 14 (1975), S. 1547-1549 
    Details
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bip.1975.360140718
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  • 9
    Electronic Resource
    Electronic Resource
    Long-range steric effects on rotational barriers in peptide chains (1975)
    New York : Wiley-Blackwell
    Biopolymers 14 (1975), S. 1773-1773 
    Details
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bip.1975.360140817
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  • 10
    Electronic Resource
    Electronic Resource
    Growth of the mitochondrial inner membrane in synchronous cultures of Tetrahymena pyriformis: An examination of phospholipid accumulation (1983)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Cellular Physiology 116 (1983), S. 57-66 
    Details
    ISSN: 0021-9541
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Based on morphological evidence, mitochondrial inner membrane growth has been reported to be discontinuous in heat shock-synchronized Tetrahymena pyriformis. As a biochemical measure of membrane growth under these conditions, we have examined phospholipid accumulation in the cell. No marked modulation of the accumulation of any of the major phospholipids could be detected through the cell cycle. At least 89% of the cardiolipin in the cells is restricted to the mitochondria, and we have used it as a marker for the growth of the mitochondrial inner membrane. During the heat shock synchrony, cardiolipin accumulates uniformly in parallel with the exponential rate of increase of total cellular phospholipids. These results suggest that at least the phospholipid component of all membrane systems in the cell grow continuously and uniformly. Additionally, we have shown that the total phospholipid content of Tetrahymena increases by a factor of 2.4 per generation following a series of heat shocks. No such net overaccumulation is observed for protein content.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jcp.1041160110
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