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  • 1
    Electronic Resource
    Electronic Resource
    Comparative biosequence metrics (1981)
    Springer
    Journal of molecular evolution 18 (1981), S. 38-46 
    Details
    ISSN: 1432-1432
    Keywords: Analogy ; Convergence ; Distance ; Divergence ; Homology ; Needleman-Wunsch-algorithm ; Sellers-algorithm ; Sequence-alignment
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The sequence alignment algorithms of Needleman and Wunsch (1970) and Sellers (1974) are compared. Although the former maximizes similarity and the latter minimizes differences, the two procedures are proven to be equivalent. The equivalence relations necessary for each procedure to give the same result are: 1, the weight assigned to gaps in the Sellers algorithm exceed that in the Needleman-Wunsch algorithm by exactly half the length of the gap times the maximum match value; and 2, for any pair of aligned elements, the degree of similarity assigned by the Needleman-Wunsch algorithm plus the degree of dissimilarity assigned by the Sellers algorithm equal a constant. The utility of the algorithms is independent of the nature of the elements in the sequence and could include anything from geological sequences to the amino acid sequences of proteins. Examples are provided using known nucleotide sequences, one of which shows two sequences to be analogous rather than homologous.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01733210
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  • 2
    Electronic Resource
    Electronic Resource
    Comparative biosequence metrics (1982)
    Springer
    Journal of molecular evolution 18 (1982), S. 423-423 
    Details
    ISSN: 1432-1432
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01840890
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  • 3
    Electronic Resource
    Electronic Resource
    Geometrical aspects of thermal diffuse scattering and the associated γ-ray and X-ray Kikuchi effects near a Bragg reflexion (1983)
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 39 (1983), S. 792-800 
    Details
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: Sharp dips which are observed in inelastic thermal diffuse γ-ray scattering intensities, and which move rigidly when the crystal is rotated, are attributed to a γ-ray Kikuchi effect. Some geometrical aspects of the effect are explored using the (Δ2θ,Δω) approach recently developed by Mathieson [Acta Cryst. (1982), A38, 378-387] for disecting a Bragg reflexion. In particular, it is shown that observation of the effect should not be very sensitive to angular divergence of the incident γ-ray beam, but should depend on the effective source size, the angular resolution of the detector and on basic crystal properties such as size, absorption coefficient and mosaicity. Some useful general results for coordinate transformations between reciprocal space and (Δ2θ,Δω) space are also presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108767383001567
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  • 4
    Electronic Resource
    Electronic Resource
    AN URBAN MANAGEMENT INFORMATION SERVICE USING LANDSAT IMAGERY (1977)
    Oxford, UK : Blackwell Publishing Ltd
    The @photogrammetric record 9 (1977), S. 0 
    Details
    ISSN: 1477-9730
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying
    Notes: The American Landsat earth resource series of satellites is continuously collecting large quantities of data. The extraction of urban growth information in the United Kingdom from these data could be of benefit to planners. This paper is an attempt to describe the current situation in this area of interest. After an introduction to remote sensing and Landsat, the type of equipment needed to extract this information by automation is described. The value of such information and the present potential of Landsat data are discussed. Finally, the importance of incorporating this information into an efficient data base is emphasised.〈section xml:id="abs1-2"〉〈title type="main"〉RésuméLes satellites américains Landsat, consacrés à l'inventaire des ressources terrestres, emmagasinent en continu de grandes masses de données. Les planificateurs du royaume-uni pourraient certainement tirer bénéfice de la partie des données relatives à la croissance urbaine: on décrit ici les possibilités en ce domaine.Après une introduction à la télédétection et au Landsat, on présente le type d'équipement permettant d'extraire ces informations; on soupèse leur fiabilité en l'état present de la technique; enfin on souligne la nécessité de les intégrer à une banque de données bien conçue.〈section xml:id="abs1-3"〉〈title type="main"〉ZusammenfassungDie Reihe der amerikanischen Landsat-Erderkundungssatelliten sammelt kontinuierlich grosse Datenmengen. Ein Auszug der Informationen über das Wachstum der Städte im Vereinigten Königreich könnte für die Planungsbehörden von Nutzen sein. Im Artikel wird der Versuch unternommen, die gegenwärtige Situation auf diesem Interessengebiet zu beschreiben. Nach einer Einführung über Fernerkundung und Landsat wird die Ausrüstung beschrieben, die zur automatischen Informationsentnahme benötigt wird. Der Wert solcher Information und die gegenwärtigen Möglichkeiten von Landsat-Daten werden diskutiert. Schliesslich wird die Bedeutung der Integration dieser Informationen in ein Datenbanksystem hervorgehoben.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1477-9730.1977.tb00079.x
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  • 5
    Electronic Resource
    Electronic Resource
    Low-temperature hall coefficient for α-U and some dilute U-Mo solid solutions (1980)
    Springer
    Journal of low temperature physics 40 (1980), S. 391-400 
    Details
    ISSN: 1573-7357
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Measurements of the Hall coefficient R H have been made as a function of temperature between 4 and 100 K for single-crystal and polycrystal α-U and α-phase U-Mo alloys containing 0.6, 3, and 7 at % Mo. A strong temperature dependence for R H, leading to a change in its sign for the single-crystal sample, is found for the uranium below 45 K. Alloying with Mo reduces the temperature dependence of R H and that for the 7 at % Mo alloy is temperature independent. The anomalous transport behavior for the uranium is linked with the anomalies which have been observed in many of the physical properties of uranium around 45 K, and the possibility that these are due to a change in Fermi surface topology resulting from a periodic lattice distortion associated with charge density wave formation is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00117124
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  • 6
    Electronic Resource
    Electronic Resource
    Superconductivity at high pressure in the A15 compounds (1972)
    Springer
    Journal of low temperature physics 6 (1972), S. 171-195 
    Details
    ISSN: 1573-7357
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The superconducting transition temperature for a number of A15 compounds has been determined as a function of hydrostatic pressure up to 25 kbar. The observed pressure dependences are compared with the predictions of a number of correlations between Tc and volume derived from zero-pressure data. The limitations of the theoretical models used to calculate Tc for the transition metals and their alloys when applied to a description of the pressure dependence are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00630915
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  • 7
    Electronic Resource
    Electronic Resource
    The phylogenetic history of immunodeficiency viruses (1988)
    [s.l.] : Nature Publishing Group
    Nature 333 (1988), S. 573-575 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Calculation of the tree with the minimum mutation distances for a set of sequences, based on the information from every postion that varies between the sequences, is referred to in numerical taxonomy as the method of 'maximum par-simony*15'21. This method depends on the pairing of all homologous ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/333573a0
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  • 8
    Electronic Resource
    Electronic Resource
    Temperature dependence of magnetovolume for Ni-Cr alloys near the critical composition for magnetism (1991)
    Springer
    International journal of thermophysics 12 (1991), S. 627-635 
    Details
    ISSN: 1572-9567
    Keywords: magnetism ; Ni-Cr alloys ; thermal expansion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Measurements of the low-temperature thermal expansion coefficient, α, of Ni-Cr alloys close to the critical concentration, x c, for the ferromagnetic regime may be represented in the form α= A+BT+CT 3. The value for A increases in magnitude as x c is approached and abruptly changes sign at x c, being positive in the paramagnetic alloys and negative in the ferromagnetic alloys. Further measurements are reported that support a qualitative description proposed to account for the sign change in A, which is based upon a correspondence between the magnetovolume and the magnitude of the ordered magnetic moment and the moment fluctuation associated with the magnetic transition.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00534218
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  • 9
    Electronic Resource
    Electronic Resource
    Thermodynamic study of the magnetic ordering of Fe3−x Mn x Si alloys (1991)
    Springer
    International journal of thermophysics 12 (1991), S. 617-626 
    Details
    ISSN: 1572-9567
    Keywords: domain configuration ; irreversible magnetization ; spin-glass ; thermal expansion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The compounds Fe3−x Mn x Si exhibit a complex magnetic behavior for 0.6⩽x⩽1.75 involving ferromagnetic ordering followed by a reordering at lower temperature. Measurements of the thermal expansion α and the specific heat C p show only a weak anomaly at the Curie temperature, T C, whereas a large, relatively sharp peak occurs at the magnetic reordering temperature, T R. Thermal expansion measurements for the Fe2.2Mn0.8Si compound made about T R are indicative of long-range ordering that can be suppressed in an applied field of ∼0.4T. Magnetization measurements show that low fields, 1–2 mT, strongly influence the bulk magnetization. Irreversible magnetization behavior, similar to that in spin-glass systems, is displayed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00534217
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  • 10
    Electronic Resource
    Electronic Resource
    Thermal expansion in the superconducting state (1978)
    Springer
    Journal of low temperature physics 32 (1978), S. 57-65 
    Details
    ISSN: 1573-7357
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: We present a model for the electronic contribution to the thermal expansion in the superconducting state based on the weak coupling BCS theory. A simple scaling parameter is introduced to accommodate strong coupling. We find satisfactory agreement between the model's predictions and experimental measurements for a number of materials exhibiting qualitatively different expansion behavior.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00116906
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