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The gabbro and serpentinized peridotite of Bonassola (Bracco-Levanto ophiolte, Italy) - An extremely low natural radiation area to improve in situ gamma spectrometry
Full text linkOutcrops of dunite, serpentinized peridotite and clinopyroxene-rich coarse gabbro around Bonassola (Bracco-Levanto ophiolite, NW Italy) have been analyzed
for natural radionuclides using γ-spectrometry. The very low activity concentrations of natural radionuclides in the dunite outcrop (< 9.0 Bq kg-1 226Ra;
< 3.5 Bq kg-1 228Ac and < 25 Bq kg-1 40K) indicate that this site is characterized by a very low natural radiation for both cosmic (being at sea level) and terrestrial
contributions. Before starting a field radiometric survey it is important to assess the local background, i.e. the g radiation that does not originate from
rock, in order to correct the measurements for the local background. Contrary to the general practice regarding the background radiation in γ-spectrometry
measurements, the investigated mafic-ultramafic outcrops has been used to estimate the detection limits for in situ measurement of 238U, 232Th and 40K using
sodium iodine (NaI) scintillator detectors. These results have proved useful to quantify the minimum detectable amount of activity (MDA) of 238U, 232Th and
40K for the NaI detector; the MDA points at sub ppm levels for 238U and 232Th and 0.01 wt% K2O.
This study also permits to assess the radiological risk of dimension stones that are petrographically similar to the serpentinized ultramafics occurring in the
Bracco-Levanto ofiolite. The comparison of the activity concentration index I, defined by the EU Basic Safety Standards Directive and depending on the activity
concentrations of 226Ra, 232Th and 40K, with other stones used as building material, indicates that the Bonassola mafic-ultramafic rocks provide a negligible
contribution to the indoor gamma radiation dose
U, Th and K concentration in bedrock data: validity of geological grouping (country study Italy)
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L'incentivazione all'occupazione femminile
No full textIl lavoro esamina le innovazioni legislative introdotte dalla legge n. 247/2007 in tema di lavoro femminile, per quanto espressamente disposto in tema di conciliazione tra lavoro e tempi di vita e di cura, in tema di imprenditoria femminile, in tema di tutela antidiscriminatoria. L'analisi è svolta nell'ottica di una più ampia ricostruzione della tematica del lavoro femminile nel quadro delle politiche di parità formale, sostanziale, di maintraimig e di welfare, così come si sono evolute sino ad oggi a partire dalla prima legislazione di tutela
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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