Search Results - (Author, Cooperation:A. Franceschini)

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  1. 1
    Latest Papers from Table of Contents or Articles in Press
  2. 2
  3. 3
    Latest Papers from Table of Contents or Articles in Press
  4. 4
    DANESE, L. ; FRANCESCHINI, A. ; ZOTTI, G.

    Oxford, UK : Blackwell Publishing Ltd
    Published 1993
    Staff View
    ISSN:
    1749-6632
    Source:
    Blackwell Publishing Journal Backfiles 1879-2005
    Topics:
    Natural Sciences in General
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  5. 5
    MARTÍN-MIRONES, J. M. ; ZOTTI, G. de ; FRANCESCHINI, A. ; DANESE, L.

    Oxford, UK : Blackwell Publishing Ltd
    Published 1991
    Staff View
    ISSN:
    1749-6632
    Source:
    Blackwell Publishing Journal Backfiles 1879-2005
    Topics:
    Natural Sciences in General
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  6. 6
    Franceschini, A. ; Duthel, J.M. ; Vallon, J.J.

    Amsterdam : Elsevier
    Staff View
    ISSN:
    0021-9673
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Chemistry and Pharmacology
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  7. 7
    Staff View
    ISSN:
    0273-1177
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Physics
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  8. 8
    Franceschini, A.
    Springer
    Published 1982
    Staff View
    ISSN:
    1572-946X
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Physics
    Notes:
    Abstract We discuss the integral observables—intensity of the background radiation due to unresolved sources and its cell-to-cell fluctuations—that constrain a source distribution function below the resolution limit, as they correspond to the distribution's first and second moments. It is shown in detail how these quantities are affected by the instrumental transmission and find that these effects vary qualitatively with the depth of the survey. One implication centers on the particular importance that the fluctuation studies still have at the present stage of X-ray astronomy to solve the question concerning the origin of the ≥2 keV background. A second, more general, implication amounts to a reformulation of the confusion limit.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  9. 9
    Cavaliere, A. ; Danese, L. ; Zotti, G. ; Franceschini, A.
    Springer
    Published 1981
    Staff View
    ISSN:
    1572-9672
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Physics
    Notes:
    Abstract The contribution of the canonical Quasars to the XRB 2–50 keV is not likely to exceed 50%. Nay, consideration of X-ray selection effects results in a further reduction of the value of sensible estimators for the intensity ratio LX/LO; in addition, recent counts of radioloud and radio-quiet Quasars definitely limit the number of faint sources. A “missing component” with definite spectral properties should comprise a sizeable fraction of the XRB.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  10. 10
    Franceschini, A. ; Zotti, G. ; Mazzei, P.
    Springer
    Published 1995
    Staff View
    ISSN:
    1572-9672
    Keywords:
    IR galaxies ; Active Galactic Nuclei ; dust emission ; galaxy formation
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Physics
    Notes:
    Abstract We briefly review some questions of extragalactic astrophysics and cosmology that would most benefit from future missions outside the Earth's atmosphere in the IR and submillimeter. These include the formation and early evolution phases in galaxies and the probably related question of quasar formation; the observation of Active Galactic Nuclei embedded in thick dusty structures (torii) and its impact on the still debated unified model of AGN activity; the observability of radiation processes occurring at very highz through background measurements; the investigation of the large scale structure and velocity field in the distant universe; and studies of the interstellar medium in galaxies. Some more emphasis is given on the galaxy formation problem, because we believe that IR-mm sensitive observations will be crucial to its final solution.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  11. 11
    Boscaini, A. ; Franceschini, A. ; Maiolini, B.
    Springer
    Published 2000
    Staff View
    ISSN:
    1573-5117
    Keywords:
    carabidae ; river ecotones ; quality assessment ; Europe ; biodiversity
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Biology
    Notes:
    Abstract Carabids are frequently used in terrestrial ecology on account of their well-known autecology, wide distribution, their role as predators generally restricted to a given area, their sensitivity to environmental changes and also due to the availability of good identification keys. The EC project ERMAS started in 1993 and involves six European countries; its aim is to study the structure and functioning of riverine ecotones in different environmental conditions. Among the tasks of the project was the evaluation of biodiversity using terrestrial invertebrates. To achieve this a considerable sampling effort was undertaken by all teams. Pitfall traps were chosen as the sampling strategy because they permit greater comparability as opposed to when different operators work in different environments. On each river system we considered five series of transects from the river margin to the edge of the floodplain. All samples were sent to the Museum of Natural Sciences of Trento for identification and data processing. In all, more than 400000 invertebrates were identified and the results were computed to form a common database. Data on the carabid community are used here for biodiversity trends, classification analysis and similarity indices.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses