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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Molecular genetics and genomics 85 (1953), S. 210-219 
    ISSN: 1617-4623
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Zusammenfassung 1. Tabby (Ta) ist ein völlig geschlechtsgebundenes Gen in der Hausmaus. In Weibchen zeigt es unvollkommene Dominanz. Männchen mit dieser Mutante gleichen homozygoten Weibchen, ein Beweis, daß das Y-Chromosom kein homologes Gen enthält. 2. Heterozygote Weibchen haben schwarze Querstreifen, die nur auf Agouti-Hintergrund erkennbar sind. Homozygote Weibchen und hemizygote Männchen zeigen eine Anzahl von Abnormitäten, die genau den von dem recessiven Autosomalfaktor crinkled hervorgerufenen gleichen. 3. Brindled und Mottled sind gleichfalls völlig geschlechtsgebunden; das geht hervor aus Koppelungsversuchen mit Weibchen, die heterozygot für Tabby und eines dieser Gene sind. Sowohl Brindled und Mottled haben Tabby gegenüber eine Rekombinationshäufigkeit von ungefähr 4%. Das beweist das Vorkommen von crossing-over in dem Differentialsegment des X-Chromosoms in Weibchen.
    Notes: Summary 1. A totally sex-linked gene, Tabby (Ta), in the house mouse is described. It is semi-dominant in females. Mutant males resemble homozygous females, which shows that there is no homologue on the Y-chromosome. 2. Heterozygous females have transverse black markings, visible only in agoutis. Homozygous females and hemizygous males have a number of defects exactly resembling those produced by the autosomal recessive crinkled. 3. Brindled and Mottled are shown also to be totally sex-linked, by means of linkage tests with Tabby in doubly heterozygous females. Both Brindled and Mottled recombine with Tabby with a frequency of about 4%. This proves that crossing-over takes place in the differential segment of the X-chromosome in females.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Molecular genetics and genomics 86 (1954), S. 263-268 
    ISSN: 1617-4623
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Zusammenfassung Die Reihenfolge der total geschlechtsgebundenen Gene und ihre Rekombinationshäufigkeit in heterozygoten Weibchen ist $$B_n - 11\% - Ta - 4\% - _{Mo}^{Br} $$ \ Rough (ro) liegt in Koppelungsgruppe V, zwischen pa und Sd und sehr dicht bei pa. Die Rekombinationshäufigkeit zwischen pa und ro ist ungefähr 0,6%.
    Notes: Summary The order of the totally sex-linked genes and the recombination frequencies in heterozygous females are — $$B_n - 11\% - Ta - 4\% - \left\{ {_{Mo}^{Br} } \right\}$$ Rough (ro) is located in linkage Group V, between pa and Sd and very close to pa. Recombination frequency between pa and ro is about 0.6%.
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Molecular genetics and genomics 84 (1951), S. 71-73 
    ISSN: 1617-4623
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Zusammenfassung Es wurde ein neues Gen der Tanzmausgruppe beschrieben mit den Symptomen Hyperaktivität, Kopfschütteln und Tanzen und Taubheit. Die Abnormalität trat bei 4 Jungen in einem Wurf freilebender wilder Hausmäuse auf, mit größter Wahrscheinlichkeit spontan. Kreuzungsversuche zeigten, daß die Abnormität durch ein rezessives Gen mit vollständiger Penetranz verursacht wird. Die neue Mutation ist nicht identisch mit v, sh-1, sh-2, je, kr, pi oder fi. English Summary. A new gene with the typical phenotype of the waltzer-shaker group is described. The name dreher, with symbol dr, is proposed. It arose, presumably by spontaneous mutation, in the wild, and was obtained in a litter of four, all of which were homozygotes, captured in a factory in Detmold, Germany. The gene is recessive and good single-factor segregations were obtained. Non-identity with v, sh-1, sh-2, je, kr, pi, and fi was proved.
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Molecular genetics and genomics 87 (1956), S. 385-391 
    ISSN: 1617-4623
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary 1. An experiment with mice is described which was intended to show whether the degree of sensitivity to environmental influences can be changed by selection of extreme phenotypic deviants for a metric character. 2. Body weight was taken as a metric character and opposite extremes (large × small) were selected as parents in the “extreme” line. Individuals closest to the mean were selected as parents in the “central” line. The coefficient of variation of body weight was followed through 13 generations of this selection. 3. No change of variability was detected in the extreme line. The males, but not the females, of the central line showed a small decline of variability. 4. The two lines diverged in body weight in both sexes in the second half of the experiment, the extreme line being the heavier. The cause of this difference is not known. 5. The conclusion to which the results point is that selection of extreme phenotypic deviants did not materially change the sensitivity to environmental influences. An increase in environmental variance from this cause is therefore unlikely to be an important consequence of unidirectional selection.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1432-2110
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Solar physics 176 (1997), S. 123-126 
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract From a sample of 7 MSFC vector magnetograms of active regions and 17 Yohkoh SXT soft X-ray images of these active regions, we have found that the total X-ray brightness of an entire active region is correlated with the total length of neutral lines on which the magnetic field is both strong (〉250 G) and strongly sheared (shear angle 〉75°) in the same active region. This correlation, if not fortuitous, is additional evidence of the importance of strong-shear strong-field neutral lines to strong heating in active regions.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Wireless personal communications 3 (1996), S. 129-147 
    ISSN: 1572-834X
    Keywords: CDMA ; decorrelating ; multiuser detection
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Notes: Abstract To date, two forms of spread spectrum code division multiple access (CDMA) have been considered in the literature. Either synchronous CDMA, where all users are both chip and bit synchronized relative to each other, or asynchronous CDMA, where all users are neither chip nor bit synchronized relative to each other. Between these two extremes lies quasi-synchronous CDMA (QS-CDMA) where users are not chip synchronized but are approximately bit synchronized. Quasi-synchronous CDMA arises in microcell systems where the combined propagation time and delay spread produces a variation in the round trip delay time limited to a few chips. Detection of QS-CDMA at the base station is considered. It is shown that memoryless detection can be achieved by appending blank chips to the user's spreading codes. Two decorrelating detectors are proposed and analyzed. The first uses a matched filter bank to produce a discrete time signal, and the second uses a single oversampling integrate-and-dump filter to produce a discrete time signal. For the first detector, each matched filter is synchronized to its respective user, and for the second detector, the integrate-and-dump filter is synchronized to the base station transmissions. The performance of the two detectors is shown to be approximately equal provided the integrate-and-dump filter is sampled at least two times the chip rate.
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1572-9672
    Keywords: coronal heating ; magnetic network ; coronal bright points
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract By combining quiet-region Fe XII coronal images from SOHO/EIT with magnetograms from NSO/Kitt Peak and from SOHO/MDI, we show that the population of network coronal bright points and the magnetic flux content of the network are both markedly greater under the bright half of the large-scale quiet corona than under the dim half. These results (1) support the view that the heating of the entire corona in quiet regions and coronal holes is driven by fine-scale magnetic activity (microflares, explosive events, spicules) seated low in the magnetic network, and (2) suggest that this large-scale modulation of the magnetic flux and coronal heating is a signature of giant convection cells.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Space science reviews 87 (1999), S. 283-286 
    ISSN: 1572-9672
    Keywords: coronal heating ; magnetic field ; magnetic shear ; magnetic explosion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract From magnetic fields and coronal heating observed in flares, active regions, quiet regions, and coronal holes, we propose that exploding sheared core magnetic fields are the drivers of most of the dynamics and heating of the solar atmosphere, ranging from the largest and most powerful coronal mass ejections and flares, to the vigorous microflaring and coronal heating in active regions, to a multitude of fine-scale explosive events in the magnetic network, driving microflares, spicules, global coronal heating, and, consequently, the solar wind.
    Type of Medium: Electronic Resource
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  • 10
    Publication Date: 2007-11-21
    Print ISSN: 1687-1472
    Electronic ISSN: 1687-1499
    Topics: Electrical Engineering, Measurement and Control Technology , Computer Science
    Published by Springer
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