Search results for "Distribution"
showing 10 items of 6008 documents
Nuovi dati sull’espansione dell’occhione Burhinus oedicnemus in Sicilia. Una riflessione sulla citizen science
2023
New data on the expansion of the Eurasian Thick-knee Burhinus oedicnemus in Sicily. A consideration of citizen science.In this work, we collected records of Eurasian Thick-knee observa-tions in Sicily by using scientific literature, citizen science programs, and social networks as data sources. The aims of this work is creat-ing a complete and up-to-date dataset, which also includes the authors’ targeted research in the field. As compared with records previously reported in literature, the data collected here, which cover the last fif-teen years, show a clear expansion trend for the Eurasian Thick-kneein Sicily. About one third of these new records come from Facebook groups dedicated to bio…
ESPANSIONE DELLA RONDINE MONTANA PTYONOPROGNE RUPESTRIS (SCOPOLI) IN SICILIA (Aves Hirundinidae)
2021
Expansion of the Eurasian Crag Martin Ptyonoprogne rupestris (Scopoli) in Sicily (Aves Hirun dinidae). Data collected during the last fifteen years on the distribution of the Eurasian Crag Martin in Sicily and the comparison with those recorded in literature show an expansion trend for this species. While in the newly colonized areas the nesting sites have been observed mainly on natural habitats, where its occurrence was previously recorded the species shows and adaptation to exploit also anthropogenic habitats, such as buildings or other infrastructures.
Flamingo studies: a general introduction.
2017
28 pages; International audience; Flamingos are among the most amazing birds in the world. The first part of this chapter provides a general introduction to the various extant species of flamingos, including their physical descriptions, unique characteristics, numbers in the wild, and geographical distributions. The second part depicts a brief history of the discovery and scientific study of flamingos, from the earlier accounts dating from the 16th century to the development of the first long-term studies of banded populations in the second half of the 20th century. The third and final part of this chapter offers some perspectives for future research.
Preparation of tungstophosphoric acid/cerium-doped NH2-UiO-66 Z-scheme photocatalyst: a new candidate for green photo-oxidation of dibenzothiophene a…
2021
International audience; The goal of this study was to introduce an effective visible-light induced photocatalytic system with a good ability for photocatalytic oxidative desulfurization (PODS) and denitrogenation (PODN) using molecular oxygen (O2) as an oxidant. In this regard, tungestophosphoric acid (PW12) was supported onto cerium-doped NH2-UiO-66 (PW12/Ce-NUiO-66) and employed for the photo-oxidation of dibenzothiophene (DBT) and quinoline (Qu). Herein, using cerium (Ce) as a “mediator” facilitated the separation of charge carriers, while NH2-UiO-66 remarkably enhanced the surface area with plentiful adsorption sites and shifted the adsorption edge of PW12to the visible region. The sum …
Poverty Reduction: The Paradox of the Endogenous Poverty Line
2007
When evaluating poverty, the relative poverty line may be considered as a percentage of the median income or it may be a percentage of the average income. It is proved that, with a poverty line relative to the median income, reducing poverty may become less costly in proportion to the total income as poverty increases (measured by the Sen, the Sen-Shorrocks-Thon or the Foster-Greer-Thorbecke poverty indexes) by passing from a Lorenz concentration curve to another curve associated with more poverty. This is obviously a paradox, although a largely overlooked one. However, it is shown that the paradox vanishes if the poverty line is relative to the average income. The demonstration is both exp…
The paradox of endogenous poverty line in the poverty indices
2007
february 23-25, 2007; When measuring poverty, the poverty line is considered to be relatively determined as a percentage of the median income or as a percentage of the average income so as to allow international comparisons. The poverty line relative to the median income may be described as endogenous in contrast with the poverty line relative to the average income which may be described as exogenous because it is independent of the normalized distribution of incomes. As the existing literature is focused on the properties of the indices but not on the respective interest of the endogenous and exogenous poverty lines, this paper compares the two definitions of the relative poverty. The Rela…
A Power Law Behavior in the Incentivized Italian Photovoltaic Market
2018
The Italian photovoltaic (PV) marketis analyzed by using the data contained in the database that describes all PV Plants installed in Italy under the incentive program called “2nd Conto Energia”. It is shown that the cumulative probability distribution of the size of the installed PV plants has a broken power tail. An approach to partially quantify the effect of the economic, juridical and technical rules is introduced in order to show how the regulatory body influences the power tail of the cumulative probability curve.
Podstawowe zagadnienia problematyki rekurencji treści cyfrowych
2018
Celem pracy jest wykazanie aktualnych problemów prawnych w związku z ewolucją dystrybucji treści cyfrowych oraz próbą wskazania możliwych innych kierunków zmian w podejściu do sposobu zakupu treści cyfrowej wraz z upowszechnieniem się novum w postaci rozproszonego konsensusu. Ten ostatni spowodował rozpowszechnienie się technologii łańcucha bloków, która wedle koncepcji wizjonerów ma w przyszłości pozwolić na rozproszone usługi hostingowe połączone z nowym podejściem do dystrybucji treści cyfrowych bez nośnika – zarówno dla konsumentów, jak i autorów zdigitalizowanych dzieł.
Análisis bibliométrico de la producción científica de la Universidad Politécnica de Valencia 1973-2001
2006
This article studies the scope of Polytechnic University of Valencia through the analysis of its scientific output since 1973 until 2001 based on the journal articles and conference papers available in the most relevant national and international databases. We analyze its productivity and time layout, according to the kind of document and language, as well as the scientific output by authors and departments, showing those most outstanding regarding productivity. On the other hand, we have researched the distribution and layout of scientific literature, pointing out the most used journals. The results show as the most relevant aspects a wide range of themes covered, the constant annual incre…
Personāla vadība izplatīšanas uzņēmumos; paaugstinot sniegumu unmotivāciju, mainot algas formulu.
2021
Autora mērķis šajā rakstā bija rast risinājumu problēmai ar motivācijas trūkumu un zemu produktivitāti gadījumā, ja izplatīšanas uzņēmums Global Drinks, pirmajā daļā aprakstītas teorijas, pēc tam, kad autore nolēma veikt aptauju un apskatīt rezultātus no aptaujas iet tālāk. Rezultātu iegūšanai autore izmantoja kvantitatīvu pētījumu metodi. Aptaujas rezultāti parādīja, ka mazo uzņēmumu darbinieku labākais motivators ir algu paaugstināšana, pēc tam, kad autore konstatēja, ka uzņēmumam ir jāpaaugstina algas, tika nolemts atrast lētu veidu, kā to paaugstināt bez zaudējumiem uzņēmumam, jo tas ir maza izmēra un katra monēta tiek skaitīta. Autors ierosināja izmantot automatizāciju, lai uzņēmums va…