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  • Articles  (111)
  • 1980-1984  (62)
  • 1965-1969  (49)
  • Computer Science  (111)
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  • Articles  (111)
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  • 1
    Electronic Resource
    Electronic Resource
    Lower bounds for on-line two-dimensional packing algorithms (1982)
    Springer
    Acta informatica 18 (1982), S. 207-225 
    Details
    ISSN: 1432-0525
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Notes: Summary Many problems, such as cutting stock problems and the scheduling of tasks with a shared resource, can be viewed as two-dimensional bin packing problems. Using the two-dimensional packing model of Baker, Coffman, and Rivest, a finite list L of rectangles is to be packed into a rectangular bin of finite width but infinite height, so as to minimize the total height used. An algorithm which packs the list in the order given without looking ahead or moving pieces already packed is called an on-line algorithm. Since the problem of finding an optimal packing is NP-hard, previous work has been directed at finding approximation algorithms. Most of the approximation algorithms which have been studied are on-line except that they require the list to have been previously sorted by height or width. This paper examines lower bounds for the worst-case performance of on-line algorithms for both non-preordered lists and for lists preordered by increasing or decreasing height or width.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00264439
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  • 2
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    Strong interactions in supported-metal catalysts (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-03-13
    Description: Many commercially important catalysts consist of small metal particles dispersed on inorganic oxide surfaces. Although in most cases there is no significant interaction between the metal and the support, strong bonding can be demonstrated in a recently discovered class of supported-metal catalysts. These cases typically involve group VIII metals dispersed on transition metal oxides whose surfaces can be reduced to form cations with lower valences. Spectroscopic measurements indicate that an electron is transferred from the cation (such as Ti(3+) or Nb(4+)) to the metal particle. This, in turn, leads to profound changes in the catalytic and chemisorption properties and the morphology of the metal particles.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tauster, S J -- Fung, S C -- Baker, R T -- Horsley, J A -- New York, N.Y. -- Science. 1981 Mar 13;211(4487):1121-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17755135" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 3
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    Two classes of single-stranded regions in DNA from sea urchin embryos (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-02-06
    Description: Native DNA from sea urchin embryos contains single-stranded regions (gaps) of up to 3000 nucleotides. The longer gaps (more than 1400 nucleotides) are nonrandomly distributed and are rich in histone gene sequences, other moderately repetitive sequences, and polypyrimidines. The shorter gaps are associated with DNA replication. A method for isolation of the two classes of single-stranded DNA pieces is reported.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wortzman, M S -- Baker, R F -- New York, N.Y. -- Science. 1981 Feb 6;211(4482):588-90.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7455698" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Differentiation ; *DNA Replication ; DNA, Single-Stranded/*analysis/genetics ; Genes ; Histones/*genetics ; Recombination, Genetic ; Sea Urchins/*genetics
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 4
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    Deep-sea drilling (1983)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1983-05-27
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Baker, D J Jr -- Heath, G R -- New York, N.Y. -- Science. 1983 May 27;220(4600):908.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17816006" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 5
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    Adaptive changes of the vestibulo-ocular reflex in flatfish are achieved by reorganization of central nervous pathways (1983)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1983-08-19
    Description: Flatfish provide a natural model for the study of adaptive changes in the vestibulo-ocular reflex system. During metamorphosis their vestibular and oculomotor coordinate systems undergo a 90 degree relative displacement. As a result, during swimming movements different types of compensatory eye movements are produced before and after metamorphosis by the same vestibular stimulation. Intracellular staining of central nervous connections in the flatfish with horseradish peroxidase revealed that in postmetamorphic fish secondary horizontal semicircular canal neurons contact vertical eye muscle motoneuron pools on both sides of the brain via pathways that are absent in all other vertebrates studied.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Graf, W -- Baker, R -- 13742/PHS HHS/ -- New York, N.Y. -- Science. 1983 Aug 19;221(4612):777-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6603656" target="_blank"〉PubMed〈/a〉
    Keywords: Adaptation, Physiological ; Animals ; Fishes/anatomy & histology/*physiology ; Metamorphosis, Biological ; Neuronal Plasticity ; Oculomotor Muscles/*physiology ; Vestibule, Labyrinth/innervation/*physiology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 6
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    Narcolepsy: biogenic amine deficits in an animal model (1983)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1983-05-06
    Description: Concentrations of biogenic amine metabolites in discrete brain areas differed significantly between dogs with genetically transmitted narcolepsy and age- and breed-matched controls. Dopamine and 3,4-dihydroxyphenylacetic acid were consistently elevated in the brains of narcoleptic animals, while homovanillic acid was not. Narcoleptic animals consistently exhibited lower utilization of dopamine and higher intraneuronal degradation of dopamine but no uniform decrease in serotonin utilization. Hence neuropathology appears to be associated with genetically transmitted canine narcolepsy. The data indicate a nonglobal depression of dopamine utilization or turnover or both.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mefford, I N -- Baker, T L -- Boehme, R -- Foutz, A S -- Ciaranello, R D -- Barchas, J D -- Dement, W C -- MH 05804/MH/NIMH NIH HHS/ -- MH 23861/MH/NIMH NIH HHS/ -- NS 13211/NS/NINDS NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1983 May 6;220(4597):629-32.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6188216" target="_blank"〉PubMed〈/a〉
    Keywords: 3,4-Dihydroxyphenylacetic Acid/analysis ; Animals ; *Brain Chemistry ; *Disease Models, Animal ; Dogs ; Dopamine/analysis ; Epinephrine/analysis ; Homovanillic Acid/analysis ; Humans ; Hydroxyindoleacetic Acid/analysis ; Narcolepsy/*physiopathology ; Norepinephrine/analysis ; Serotonin/analysis ; Sleep, REM/physiology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 7
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    The European landscape: geomorphology of europe (1984)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1984-07-13
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Baker, V R -- New York, N.Y. -- Science. 1984 Jul 13;225(4658):161-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17837922" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 8
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    Goal orientation by blindfolded humans after long-distance displacement: possible involvement of a magnetic sense (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-10-31
    Description: A wide range of animals are able to orient toward home when subjected to displacement-release experiments. When comparable experiments are performed on blindfolded humans, a similar ability emerges. Such goal-orientation does not result from following the complete journey on a mental map, nor is it influenced by cloud cover. Bar magnets worn on the head do seem to exert an influence.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Baker, R R -- New York, N.Y. -- Science. 1980 Oct 31;210(4469):555-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7423208" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Female ; Humans ; Magnetics ; Male ; Orientation/*physiology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 9
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    The establishment of science in france (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-10-02
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Baker, K M -- New York, N.Y. -- Science. 1981 Oct 2;214(4516):54-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17802568" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 10
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    Early experience determines song dialect responsiveness of female sparrows (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-11-13
    Description: In a laboratory experiment, female white-crowned sparrows responded almost exclusively to male songs taken from their home dialect region and usually not to songs taken from an alien dialect region. Song dialect populations may represent a level of genetic population structure below that of the subspecies and may play an important role in songbird evolution.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Baker, M C -- Spitler-Nabors, K J -- Bradley, D C -- New York, N.Y. -- Science. 1981 Nov 13;214(4522):819-21.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17744404" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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