ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 134 (1934), S. 177-178 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] WE should like to give a brief account of some further results obtained with the Boys lightning camera, which has now been modified so as to include a means of determining the order of the component strokes of a discharge. The material available refers to 55 lightning flashes from eleven ...
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 136 (1935), S. 831-831 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] PHOTOGRAPHY of lightning strokes with the Boys camera has shown that each separate stroke is of a dual nature, consisting of a leader and a return portion. It has been shown that the return stroke travels from ground to cloud, passing outwards along the branches when it reaches branching points ...
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Pure and applied geophysics 38 (1957), S. 250-260 
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary A theoretical study of the optics of lightning cameras shows that the focal length as well as the relative aperture of the lens should be considered in the photography of streamers having the dimensions of the stepped leader. Increasing the focal length increases the useful distance range of the camera and allows it to be run at higher speeds for near photography. The effects produced on the photographs by variations in the dimensions of stepped leaders, the grain size and speed of the emulsion, the light scattered by rain and the camera speed, are critically examined. In conclusion a camera is described which has a lens of focal length 14 cm and a relative aperturef/2. The film, in the form of a belt, is run between two small drums to keep it flat in the image field. It has been possible to obtain records of stepped leaders at a distance of 35 km and the camera shows promise of being able to photograph the pilot streamer.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Pure and applied geophysics 34 (1956), S. 221-223 
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary Lightning discharge streamers are occasionally visible inside and above the base of isolated convection thunderclouds. Two photographs of such a transparent cloud are discussed. They show that the negatively charged region reaches to an altitude of 8 km and has a horizontal width of about 8 km.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Pure and applied geophysics 34 (1956), S. 224-230 
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary Although lightning flashes have been photographed which apparently have up to 40 or more component strokes, no flashes having more than 14 strokes have been observed on records of the eletrical fields of thunderstorms. The apparent discrepancy between the two methods of observation is explained by the fact that small momentary increases in the continuing current flowing to ground after some strokes, are easily mistaken for component strokes on photographs taken with slow cameras. After the cessation of a discharge, the ionization of the lightning channel decreases at such a rate that a subsequent discharge to earth will require a fresh leader if it follows within an interval longer than about 15 millisec; discharges following at shorter intervals are not preceded by leaders. The channel loses its ionization completely in about 100 millisec. In general, the larger the number of component strokes, the longer is the duration of the flash, but there is no definite relationship between the number of strokes and the duration. Flashes of exceptionally long duration always have one or more very long intervals between two successive strokes and during these intervals there appears to be very little electrical activity in the cloud; it is suggested that the main progress of the discharge in the cloud takes place during the shorter intervals, so that flashes of long duration do not necessarily drain very extensive regions of charge.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Meteorology and atmospheric physics 3 (1950), S. 64-69 
    ISSN: 1436-5065
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography , Physics
    Description / Table of Contents: Zusammenfassung Eine große Gewitterwolke besteht aus zahlreichen getrennten zweipoligen Generatoren und getrennten Zellen die die Wolke bilden. Die vonSimpson mit dem Höhen-Elektrographen gefundenen Beweise, daß die tieferen negativen Pole dieser Generatoren gewöhnlich bei oder über dem Gefrierniveau liegen, werden von drei verschiedenen Argumenten gestützt, die auf der Untersuchung der Blitzentladungen zur Erde beruhen. Es wird gezeigt, daß positive Spitzenentladung von der Erde her isolierte Gebiete von positiver Ladung in der wirklichen Basis hervorrufen kann. In einem Überblick über neuere experimentelle Untersuchungen wird gezeigt, in welcher Weise die tieferliegenden negativen Pole dieser getrennten Generatoren sich mit dem ersten Blitzkanal verketten.
    Abstract: Résumé Un gros nuage d'orage se compose de nombreux générateurs bipolaires distincts et de cellules de nuage distinctes. Les preuves données parSimpson à l'aide de l'alti-électrographe que les pôles négatifs inférieurs de ces générateurs se trouvent en général au voisinage ou au-dessus du niveau de congélation sont étayées ici de trois arguments tirés de l'étude des décharges des coups de foudre. On montre que les décharges positives de pointes au niveau du sol peuvent créer des domaines isolés, chargés positivement, dans la base du nuage. Passant en revue de récentes recherches expérimentales, l'auteur montre comment les pôles négatifs les plus bas de ces générateurs distincts sont liés à la première trajectoire de décharge.
    Notes: Abstract A large thundercloud consists of a number of separate bipolar generators associated with separate cells forming the cloud. Evidence obtained bySimpson with the alti-electrograph showing that the lower negative poles of these generators are usually at or above the freezing-level is supported by three different arguments based upon the study of lightning discharges to earth. It is shown that positive point discharge from the ground may produce isolated pockets of positive charge in the actual base. An outline is given of recent experimental results which throw light upon the manner in which the lower negative poles of these separate generators link up with the channel of the first stroke.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 7
    Publication Date: 1950-11-01
    Print ISSN: 0177-7971
    Electronic ISSN: 1436-5065
    Topics: Geography , Physics
    Published by Springer
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 8
    Publication Date: 1950-06-01
    Print ISSN: 0370-1301
    Topics: Physics
    Published by Institute of Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 9
    Publication Date: 1951-06-01
    Print ISSN: 0370-1301
    Topics: Physics
    Published by Institute of Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 10
    Publication Date: 1934-08-01
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Springer Nature
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...