1,723,823 research outputs found
Radar-based Quantitative Precipitation Estimation over arid, semi-arid and Mediterranean climate regimes in Israel
No full textRadar-based Quantitative Precipitation Estimation over Mediterranean and dry climate regions
No full textQuantitative precipitation estimation based on meteorological radar data potentially
provides continuous, high-resolution, large-coverage data that are essential for
meteorological and hydrologic analyses. While intense scientific efforts have focused on
precipitation estimation in temperate climatic regimes, relatively few studies examined
radar-based estimates in dry climatic regions. The paper examines radar-based rain depth
estimation for rainfall periods (a series of successive rainy days) in Israel, where the
climate ranges between Mediterranean to dry. Three radar-gauge adjustment methods are
compared: a one-coefficient bulk adjustment, which simply removes the mean bias; a
two-coefficient range adjustment based on a weighted regression (WR); and a
four-coefficient adjustment based on a weighted multiple regression (WMR), which
assumes a locally varied, nonisotropic correction factor. The WMR technique has been
previously applied in the Alps of Europe. Adjustment coefficients have been derived for
28 rainfall periods using 59 independent gauges of a quality-checked training data set. The
validation was based on an independent data set composed of gauges located in eleven
20 20 km2 validation areas, which are representative of different climate, topography
and radar distance conditions. The WR and WMR methods were found preferable with
a slight better performance of the latter. Furthermore, a novel approach has been adopted
in this study, whereby radar estimates are considered useable if they provide information
that is better than gauge-only estimates. The latter was derived by spatial interpolation of
the gauges belonging to the training data set. Note that these gauges are outside the
validation areas. As for the radar-adjusted estimates, gauge-derived estimates were
assessed against gauge data in the validation areas. It was found that radar-based estimates
are better for the validation areas at the dry climate regime. At distances larger than
100 km, the radar underestimation becomes too large in the two northern validation areas,
while in the southern one radar data are still better than gauge interpolation. It is concluded
that in ungauged areas of Israel it is preferable to use WMR-adjusted (or alternatively,
simply WR-adjusted) radar echoes rather than the standard bulk adjustment method and
for dry ungauged areas it is preferable over the conventional gauge-interpolated values
derived from point measurements, which are outside the areas themselves. The WR and
WMR adjustment methods provide useful rain depth estimates for rainfall periods for the
examined areas but within the limitation stated abov
Introduction: Theatre and the Rise of Human Rights
No full textIt may be that, in keeping with global political aspirations, the twenty-first century will become the century of human rights.1 As many voices advocate as oppose such an aspiration, and the worlds of theatre and performance are no exception: the empowering qualities of theatre have been acknowledged by many, especially in relation to vulnerable communities.2 In the wake of the human rights legislation that emerged after World War II and the United Nations’ 1948 Universal Declaration of Human Rights, theatre and performance artists have increasingly promoted specific human rights issues in their work and sought to establish special ties with various forms of human rights advocacy.3 The theatre artists who are connected with human rights are myriad, and some of the most celebrated include Augusto Boal (Brazil), renowned for his ‘Theatre of the Oppressed’ practices; Ariel Dorfman (Argentina); Athol Fugard and Yael Farber (South Africa); Václav Havel (Czech Republic); Harold Pinter (Great Britain); Nawal El Sadaawi (Egypt); Farzaneh Aghaeipour (Iran); Marcie Rendon and Cherrie Moraga (United States); Mangai (India); Nighat Rizvi, Madeeha Gauhar and Shahid Nadeem (Pakistan); and Juliano Mer Khamis, who was murdered in 2011 outside his theatre in the Palestinian refugee camp in Jenin, on the West Bank
Quantitative estimation of daily rain amounts over Mediterranean and dry climates using radar and rain gauge data
No full text
Morin E., Introduction à une politique de l'homme.
No full textChazel François. Morin E., Introduction à une politique de l'homme.. In: Revue française de sociologie, 1966, 7-2. pp. 238-239
Riforma dell'educazione, riforma del pensiero. Per una via comune
No full textin Scuola Democratica. Rivista di ricerca sociale e strategie formative. Diretta da Luciano Benadus
Characteristics of Flash Flood Regimes in the Mediterranean Region
No full textThis work analyses the prominent characteristics of extreme storms and flash-flood regimes in two main areas of the Mediterranean region: the North- Western (comprising Spain, France and Italy) and South-Eastern region (Israel). The two areas are chosen to represent the two end members of variation in flashflood regimes in the Mediterranean basin. Data from 99 events collected in the two areas (69 from the North-Western region and 30 from the South-Eastern region), for which occurrence date, catchment area and flood peak are available, were used to provide a detailed description the flash-flood seasonality patterns, the synoptic and mesoscale atmospheric controls, and flood envelope relationship. Results show that the flood envelope curve for the South-Eastern region exhibits a more pronounced decreasing with catchment size with respect to the curve of the North-Western region. The differences between the two relationships reflect variations in the fractional storm coverage of the basi..
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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