Search results for " regionalization"
showing 3 items of 13 documents
Regional flow duration curves for ungauged sites in Sicily
2011
Abstract. Flow duration curves are simple and powerful tools to deal with many hydrological and environmental problems related to water quality assessment, water-use assessment and water allocation. Unfortunately the scarcity of streamflow data enables the use of these instruments only for gauged basins. A regional model is developed here for estimating flow duration curves at ungauged basins in Sicily, Italy. Due to the complex ephemeral behaviour of the examined region, this study distinguishes dry periods, when flows are zero, from wet periods using a three parameters power law to describe the frequency distribution of flows. A large dataset of streamflows has been analysed and the param…
Cuticular hydrocarbon profiles differ between ant body parts: implications for communication and our understanding of CHC diffusion.
2020
Abstract Insect cuticular hydrocarbons (CHCs) serve as communication signals and protect against desiccation. They form complex blends of up to 150 different compounds. Due to differences in molecular packing, CHC classes differ in melting point. Communication is especially important in social insects like ants, which use CHCs to communicate within the colony and to recognize nestmates. Nestmate recognition models often assume a homogenous colony odor, where CHCs are collected, mixed, and redistributed in the postpharyngeal gland (PPG). Via diffusion, recognition cues should evenly spread over the body surface. Hence, CHC composition should be similar across body parts and in the PPG. To te…
Urban Regionalisation Processes : Governance of Post-Urban Phenomena in Sicily
2021
The critical reflection on modern cities, that continued through the 20th century, has fed a wide- ranging and controversial debate within urban studies. The theoretical category of “urban” as a spatial, social product as well as being an economic and political one, has changed via new settlement principles, an expression of “new forms of cities” and also of new “city demand”, and of the various use practices that produce and are produced in these new territories. This book tries to answer the questions on transformation phenomena of urban dimension (regionalization processes), for which the interpretations provided in reference literature are not totally convincing. In fact, traditional re…