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  • 1
    Electronic Resource
    Electronic Resource
    Dimension and entropy analysis of MEG time series from human α-rhythm (1993)
    Springer
    The European physical journal 91 (1993), S. 251-256 
    Details
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Magnetoencephalograms (MEG) from human brain were measured by means of a 37 channel SQUID magnetometer (KRENIKON). Correlation integrals were calculated from time series exhibiting strong α-rhythm in order to give estimates of correlation dimension andK 2 entropy. The results are discussed regarding the length and the stationarity of the data. It is shown that low spurious correlation dimensions andK 2-entropies may easily be obtained as artefacts due to time correlations in phase space and data length. When time correlations are avoided and the length of time series is taken into account, estimates of correlation dimension andK 2 entropy indicate no evidence of the existence of low dimensionality.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01315243
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Pressure dependence of the electric field gradient in Sb and Sb1−x M x (M=ln, Zn, Ge, Pb, Cd, Sn) at the site of111Cd (1995)
    Springer
    The European physical journal 97 (1995), S. 493-497 
    Details
    ISSN: 1434-6036
    Keywords: 31.30 G ; 61.70 Y
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Using the111Cd-TDPAC (time differential perturbated angular correlation) method, the pressure dependence of the electric field gradient (EFG) in Sb and Sb1−x M x (M=ln, Zn, Ge, Pb, Cd, Sn) was investigated. The application of a phenomenological ansatz for the parametrisation of the pressure and temperature dependence of the EFG made it possible to combine temperature data gained in former studies [1], [2] with the pressure dependent data presented in this paper. The resulting pressure dependence of −2±0.2 MHz/kbar is shown to be independent of concentration and element of admixture. Results for the volume and explicit temperature dependence agree with existing information on the mixed system Sb1−x M x (M=ln, Zn, Ge, Pb, Cd, Sn); the investigation of the EFG in Sb1−x−y M x Pb y showed that the resulting EFG may be interpreted as the weighted sum of the individual contributions of the two metals.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01322429
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  • 3
    Electronic Resource
    Electronic Resource
    Laser beam cutting (1995)
    Springer
    Optical and quantum electronics 27 (1995), S. 1257-1271 
    Details
    ISSN: 1572-817X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract The fundamentals of the manufacturing process of laser beam cutting are discussed. The equipment necessary for working on two- and three-dimensional applications is described. Criteria for characterizing cutting quality and cutting applications with different laser types are presented. Both modelling of the process and study of process emissions are involved in optimizing the process and system performance, and an overview is given of research results in these areas.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00326480
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  • 4
    Electronic Resource
    Electronic Resource
    Concurrent manufacturing of parts and tools for the sheet-metal industry (1998)
    Springer
    Journal of intelligent manufacturing 9 (1998), S. 347-352 
    Details
    ISSN: 1572-8145
    Keywords: Sheet metal parts ; computer-aided process planning ; bending tools ; laminated object modelling ; neural networks
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The manufacturing of complex bent parts can be supported effectively by computer-aided planning methods. Software systems are already available for unfolding, laser cutting and bending sequence determination. The paper focuses on methods that support the design of non-standard bending tools and the flexible manufacturing of such tools using laminated object modelling (LOM) technology. The developed system allows for concurrent planning and manufacturing of bending parts and tools. Within the framework of this system, neural networks are applied for automated tool design.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008930926776
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  • 5
    Electronic Resource
    Electronic Resource
    Die titrimetrische Bestimmung von Magnesium (1931)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 84 (1931), S. 137-137 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01355625
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  • 6
    Electronic Resource
    Electronic Resource
    Über die analytische Bestimmung von 0,0-Dimethyl-2,2-dichlorvinylphosphat (DDVP) (1960)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 174 (1960), S. 401-407 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Zusammenfassung Für die Bestimmung des hochwirksamen Insecticids DDVP wurden drei voneinander unabhängige Methoden gefunden. Die erste beruht auf der jodometrischen Bestimmung des durch alkalische Spaltung gebildeten Dichloracetaldehyds. Bei der zweiten wird der durch alkalische Hydrolyse abgespaltene Phosphorsäuredimethylester acidimetrisch erfaßt. Diese beiden Arbeitsmethoden eignen sich für die Bestimmung von Makromengen DDVP, während die dritte Methode Mengen bis auf wenige Mikrogramme herunter erfaßt. Sie beruht auf der Umsetzung von DDVP in wäßriger Lösung mit Resorcin und Alkali unter Bildung eines gelben Farbstoffes mit grüner Fluorescenz, der colorimetrisch gemessen werden kann.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00449825
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  • 7
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    development and domestication (2016)
    Royal Society
    Details
    Publication Date: 2016-06-03
    Description: Studies on domestication are blooming, but the developmental bases for the generation of domestication traits and breed diversity remain largely unexplored. Some phenotypic patterns of human neurocristopathies are suggestive of those reported for domesticated mammals and disrupting neural crest developmental programmes have been argued to be the source of traits deemed the ‘domestication syndrome’. These character changes span multiple organ systems and morphological structures. But an in-depth examination within the phylogenetic framework of mammals including domesticated forms reveals that the distribution of such traits is not universal, with canids being the only group showing a large set of predicted features. Modularity of traits tied to phylogeny characterizes domesticated mammals: through selective breeding, individual behavioural and morphological traits can be reordered, truncated, augmented or deleted. Similarly, mammalian evolution on islands has resulted in suites of phenotypic changes like those of some domesticated forms. Many domesticated mammals can serve as valuable models for conducting comparative studies on the evolutionary developmental biology of the neural crest, given that series of their embryos are readily available and that their phylogenetic histories and genomes are well characterized.
    Keywords: palaeontology, developmental biology, evolution
    Electronic ISSN: 2054-5703
    Topics: Natural Sciences in General
    Published by Royal Society
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  • 8
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    On the lack of a universal pattern associated with mammalian domestication: differences in skull growth trajectories across phylogeny (2017)
    Royal Society
    Details
    Publication Date: 2017-10-26
    Description: As shown in a taxonomically broad study, domestication modifies postnatal growth. Skull shape across 1128 individuals was characterized by 14 linear measurements, comparing 13 pairs of wild versus domesticated forms. Among wild forms, the boar, the rabbit and the wolf have the highest proportion of allometric growth, explaining in part the great morphological diversity of the domesticated forms of these species. Wild forms exhibit more isometric growth than their domesticated counterparts. Multivariate comparisons show that dogs and llamas exhibit the greatest amount of differences in trajectories with their wild counterparts. The least amount is recorded in the pig–boar, and camel and horse pairs. Bivariate analyses reveal that most domesticated forms have growth trajectories different from their respective wild counterparts with regard to the slopes. In pigs and camels slopes are shared and intercepts are different. There is a trajectory extension in most domesticated herbivores and the contrary pattern in carnivorous forms. However, there is no single, universal and global pattern of paedomorphosis or any other kind of heterochrony behind the morphological diversification that accompanies domestication.
    Keywords: taxonomy and systematics, developmental biology, evolution
    Electronic ISSN: 2054-5703
    Topics: Natural Sciences in General
    Published by Royal Society
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  • 9
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    A longitudinal study of phenotypic changes in early domestication of house mice (2018)
    Royal Society
    Details
    Publication Date: 2018-03-07
    Description: Similar phenotypic changes occur across many species as a result of domestication, e.g. in pigmentation and snout size. Experimental studies of domestication have concentrated on intense and directed selection regimes, while conditions that approximate the commensal and indirect interactions with humans have not been explored. We examine long-term data on a free-living population of wild house mice that have been indirectly selected for tameness by regular exposure to humans. In the course of a decade, this mouse population exhibited significantly increased occurrence of white patches of fur and decreased head length. These phenotypic changes fit to the predictions of the ‘domestication syndrome'.
    Keywords: evolution
    Electronic ISSN: 2054-5703
    Topics: Natural Sciences in General
    Published by Royal Society
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  • 10
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    Dressing down: convergent reduction of the mental disc in Garra (Teleostei: Cyprinidae) in the Middle East (2016)
    Springer
    Details
    Publication Date: 2016-08-04
    Print ISSN: 0018-8158
    Electronic ISSN: 1573-5117
    Topics: Biology
    Published by Springer
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