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  • 1
    Electronic Resource
    Electronic Resource
    Parallel simulation by multi-instruction, longest-path algorithms (1997)
    Springer
    Queueing systems 27 (1997), S. 37-54 
    Details
    ISSN: 1572-9443
    Keywords: massive parallel processing ; simulation ; MIMD and SIMD parallel computers ; scalable algorithm ; G/G/1 queue ; longest path ; queueing networks
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Notes: Abstract This paper presents several basic algorithms for the parallel simulation of G/G/1 queueing systems and certain networks of such systems. The coverage includes systems subject to manufacturing or communication blocking, or to loss of customer due to capacity constraints. The key idea is that the customer departure times are represented by longest-path distance in directed graphs instead of by the usual recursive equations. This representation leads to scalable algorithms with a high degree of parallelism that can be implemented on either MIMD or SIMD parallel computers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1019149712019
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  • 2
    Electronic Resource
    Electronic Resource
    An in vitro transcription termination system to analyze chloroplast promoters: identification of multiple promoters for the spinach atpB gene (1990)
    Springer
    Current genetics 17 (1990), S. 55-64 
    Details
    ISSN: 1432-0983
    Keywords: Chloroplast ; Promoters ; atpB ; Transcription termination
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Promoters for spinach chloroplast genes were cloned 5′ to a strong factor-independent transcription terminator from E. coli. These “minigene” constructions were transcribed in vitro by a transcriptionally active extract of spinach chloroplasts. Transcription of super-coiled DNA templates resulted in synthesis of discretely-sized RNAs that were readily quantifiable. The efficiency of transcription was up to 3.5 RNAs per template. The transcription termination system described in this report was used to identify the primary transcripts for the plastid atpB gene. Four in vivo transcripts for the atpB gene have been previously identified with 5′ untranslated leaders of approximately 455, 275, 180 and 100 nucleotides, respectively. In this report we show that the “-455”, “-275” and “-180” regions function as chloroplast promoters in vitro. In addtion, a fourth promoter was found that yields a primary transcript totally lacking an untranslated leader.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00313249
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  • 3
    Electronic Resource
    Electronic Resource
    The divergently transcribed rbcL and atpB genes of tobacco plastid DNA are separated by nineteen base pairs (1990)
    Springer
    Current genetics 17 (1990), S. 65-71 
    Details
    ISSN: 1432-0983
    Keywords: rbcL ; atpB ; Chloroplast transcripts ; Divergent promoters
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The in vivo transcripts of the tobacco chloroplast gene for the beta subunit of the ATPase (atpB) were examined. In tobacco, like spinach, the atpB gene encodes multiple transcripts. Six tobacco atpB transcripts are present in vivo, with 5′ ends at positions “-90”, “-255”, “-290”, “-490”, “-500” and “-610” relative to the translation initiation site. The 5′ end of the atpB gene (“-610” position) is 20 base pairs from the 5′ end of the rbcL gene, coded for on the complementary strand. The “-255”, “-490” and “-610” regions are recognized as promoters in vitro by spinach chloroplast and E. coli RNA polymerases.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00313250
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  • 4
    Electronic Resource
    Electronic Resource
    InP-based optoelectronic devices for optical fiber communications (1999)
    Springer
    Czechoslovak journal of physics 49 (1999), S. 751-756 
    Details
    ISSN: 1572-9486
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract In this contribution we report the research and development of 1.55 μm InGaAsP/InP gain-coupled DFB laser with an improved injection-carrier induced grating and of high performance 1.3 μm and 1.55 μm InGaAsP/InP FP and DFB lasers for communications. Long wavelength strained MQW laser diodes with a very low threshold current (7–10 mA) have been fabricated. Low pressure MOVPE technology has been employed for the preparation of the layered structure. A novel gain-coupled DFB laser structure with an improved injection-carrier modulated grating has been proposed and fabricated. The laser structures have been prepared by hybrid growth of MOVPE and LPE techniques and reasonably good characteristics have been achieved for resultant lasers. High performance 1.3 μm and 1.55 μm InGaAsP/InP DFB lasers have successfully been developed for CATV and trunk line optical fiber communication.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1021280822112
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  • 5
    Electronic Resource
    Electronic Resource
    Albumin — vitamin D-binding protein haplotypes in Asian-Pacific populations (1990)
    Springer
    Human genetics 〈Berlin〉 85 (1990), S. 89-97 
    Details
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary We have determined the various haplotypic combinations between alleles as well as restriction fragment length polymorphisms of two linked genetic markers, albumin and vitamin D-binding protein or group-specific component, in a number of Asian-Pacific populations. Using the partial maximum likelihood method, we constructed a phylogenetic network from the haplotype frequencies to assess relationships among the populations sampled. No systematic linkage disequilibrium was detected between most of the combinations, suggesting a lack of operation of any selection pressure at the two loci. The phylogenetic analysis confirmed the known interrelationships among various populations in the Asian-Pacific region. The Australian aborigines clustered closely with the non-Austronesian-speaking highlanders from Papua New Guinea, as expected. Similarly, the Austronesian-speaking Polynesians, Micronesians, and the Southeast Asians branched off together as a separate group. The position of the Austronesian-speaking Tolais from New Britain with respect to other populations from the Southwest Pacific was anomalous. The Tolais revealed a strong affinity with the Australian aborigines, which is inexplicable. The populations from China formed a tight cluster with other populations from the Asian-Pacific region. Genetic interrelationships of these populations with the white Australians were remote, which is in accordance with the known affinities of various human racial groups.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00276330
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  • 6
    Electronic Resource
    Electronic Resource
    Differential operator Lie algebras on the ring of Laurent polynomials (1995)
    Springer
    Communications in mathematical physics 167 (1995), S. 431-469 
    Details
    ISSN: 1432-0916
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Physics
    Notes: Abstract A class of differential operator Lie algebras on the unit circle is introduced and discussed. They are the natural generalizations of the Witt algebra and the Virasoro algebra. Among them are the higher-spin algebrasW 1+∞ andW ∞ which occur in the physics literature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02100593
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  • 7
    Electronic Resource
    Electronic Resource
    Renin locus restriction fragment length polymorphism (1989)
    Springer
    Human genetics 〈Berlin〉 82 (1989), S. 302-302 
    Details
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The use of two genomic EcoRI fragments as probes is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00291180
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  • 8
    Electronic Resource
    Electronic Resource
    Unconventional polarization arrangements in PbTiO3 single crystals (1999)
    Springer
    Journal of materials science 10 (1999), S. 299-306 
    Details
    ISSN: 1573-482X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Polarization arrangements and ferroelectric domain structures of poly-domain flux-grown PbTiO3 crystals have been studied using optical and electron microscopy. Most of the specimens show band arrangements which may correspond to surface relief characteristics of as-grown crystals. Drawing schematic polarization configurations, one finds that head-to-head, tail-to-tail, or other unconventional polarization configurations exist constantly in PbTiO3 crystals, indicating that the high electrical energy configurations are quite common in lead titanate crystals. Investigations on etched crystals indicate that crystals grown under different conditions show similar domain structure and polarization characteristics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008976819063
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  • 9
    Electronic Resource
    Electronic Resource
    Analysis of chloroplast promoters using bidirectional transcription vectors (1990)
    Springer
    Plant molecular biology 15 (1990), S. 421-435 
    Details
    ISSN: 1573-5028
    Keywords: chloroplast promoters ; transcription termination ; rbcL ; atpB ; thra ; hisa
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Spinach chloroplast RNA polymerase has been shown to efficiently terminate transcription at the threonine attenuator (thra) from Escherichia coli [7]. In this study, efficient transcription termination by the chloroplast RNA polymerase was observed at a second prokaryotic terminator, the histidine attenuator (hisa) from Salmonella typhimurium. Termination occurred regardless of the orientation of either attenuator. In higher-plant chloroplast DNA, the genes for the β subunit of the ATPase (atpB) and the large subunit of ribulose 1,5-bisphosphate carboxylase/oxygenase (rbcL) are adjacent and divergently transcribed. Bidirectional transcription vectors, containing the histidine and threonine terminators, were constructed to analyze the divergently oriented atpB and rbcL promoters. One plasmid construction, pRTT7, contained two tandem copies of the threonine attenuator (pRTT7). Two additional constructs, pRHT1 and pRHT2, each contained oppositely oriented copies of thra and hisa. A DNA fragment containing the rbcL and atpB promoters was inserted between the two terminators present in the pRTT7, pRHT1, and pRHT2 plasmids. Transcription of these recombinant DNAs by spinach chloroplast RNA polymerase resulted in discretely sized rbcL and atpB transcripts. In addition, these bidirectional transcription vectors were used to identify previously uncharacterized chloroplast promoters.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00019159
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  • 10
    Electronic Resource
    Electronic Resource
    A primary transcript in spinach chloroplasts that completely lacks a 5′ untranslated leader region (1990)
    Springer
    Plant molecular biology 15 (1990), S. 111-119 
    Details
    ISSN: 1573-5028
    Keywords: atpB ; multiple promoters ; polysomal mRNA ; ribosome-binding site ; transcription
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A fifth, previously undetected transcript for the plastid gene encoding the β subunit of spinach chloroplast ATPase (atpB) has recently been identified in vitro. In this report we show that this transcript is present in vivo and its 5′ end is at the translation start codon. When synthesized in vitro using spinach chloroplast RNA polymerase, the 5′ end of this novel transcript is located at the beginning of the second codon of the atpB coding sequence. Although this atpB transcript lacks an untranslated leader region, it is an abundant RNA in vivo and is associated with crude polysomal fractions, as are the four larger atpB transcripts. In vitro synthesis of the leaderless transcript does not occur for a plasmid DNA in which the ‘−35’ region of the promoter is deleted.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00017728
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