Search results for "Tier"
showing 10 items of 968 documents
Zvaigžņotā Debess: 2020/2021, Ziema (250)
2021
Zvaigžņotā Debess: 2021, Pavasaris (251)
2021
Worker Personality and Its Association with Spatially Structured Division of Labor
2014
Division of labor is a defining characteristic of social insects and fundamental to their ecological success. Many of the numerous tasks essential for the survival of the colony must be performed at a specific location. Consequently, spatial organization is an integral aspect of division of labor. The mechanisms organizing the spatial distribution of workers, separating inside and outside workers without central control, is an essential, but so far neglected aspect of division of labor. In this study, we investigate the behavioral mechanisms governing the spatial distribution of individual workers and its physiological underpinning in the ant Myrmica rubra. By investigating worker personali…
Consumer Demand for Environmental, Social, and Ethical Information in Fishery and Aquaculture Product Labels
2022
[EN] Customers' attention to sustainability labels in fishery and aquaculture products (FAPs) has been increasing in the last decades, and the industry has adapted to this growing interest by adopting fish ecolabels. However, there is a growing interest to widen the sustainability concept to include the social and ethical information of the fishery and aquaculture industry and to go further from the voluntary approach on the labeling of these aspects in FAPs. For this reason, using data from 2021 Eurobarometer and using machine learning techniques, we disentangle the characteristics of the FAP buyers that consider the importance of environmental impact, ethical, and social information appea…
A Layered Architecture for Sentiment Classification of Products Reviews in Italian Language
2017
The paper illustrates a system for the automatic classification of the sentiment orientation expressed into reviews written in Italian language. A proper stratification of linguistic resources is adopted in order to solve the lacking of an opinion lexicon specifically suited for the Italian language. Experiments show that the proposed system can be applied to a wide range of domains.
Dynamic composition of services : application to designing and developping information systems in a distributed environment
2010
The service oriented computing paradigm plays an increasingly important role in structuring complex systems. Application design and development approaches are witnessing a shift from traditional models towards a more dynamic service oriented model promoting reuse and adaptability. In this thesis, we study an approach for application design and development based on services’ composition. We propose DyCoSe, an environment for sharing services. It consists of an enterprise ecosystem wherein members, organized in communities, share a global agreement describing traditional business functionalities and common non-functional properties. DyCoSe relies on a three level architecture for service base…
Stochastic frontier models using R
2020
Abstract The production function is usually assumed to specify the maximum output obtainable, from a given set of inputs, describing the boundary or frontier of the obtainable output from each feasible combination of input; it relates the production process of individual units to the efficient border of the production possibilities. The measure of the distance of each unit from the border is the most immediate way to assess its (in)efficiency. However, the production function is not generally known, but it has only a set of information on each production unit and it is therefore essential to develop techniques to estimate the production frontier. Starting from the packages already developed…
Trasformazioni del paesaggio e conservazione degli habitat nella zona umida di Vendicari (Sicilia)
2009
Il sito Natura 2000 “Vendicari” (ITA090002) si colloca in un più ampio sistema di zone umide costiere della Sicilia Sud-orientale. La particolarità di questi ambienti è legata alla presenza di lagune costiere e di formazioni vegetali che generalmente si trovano a contatto con esse. Questi ambienti costituiscono l’habitat per diverse specie, nonché esclusivi punti di sosta per molti uccelli migratori. Queste aree, un tempo più estese in Sicilia, durante il secolo scorso sono state sottoposte a disturbi e trasformazioni ambientali e paesaggistiche con conseguente riduzione della biodiversità. Le cause che hanno determinato maggiormente tali trasformazioni sono legate allo sfruttamento agricol…
Interventi antierosivi fra tradizione ed innovazione: convegno
2012
interventi antierosivi
L'incremento della sostenibilità ambientale attraverso la diminuzione del rischio erosivo.
2014
Riassunto: Lo scopo di questo lavoro è quello di mettere a punto, a partire dalle informazioni territoriali quali caratteristiche meteorologiche e pedologiche,uno studio capace di evidenziare la sostenibilità della gestione attuale di due ipoteticheparcelle sperimentali individuate nel territorio del sottobacino Iudeo-Bucari (Trapani). Si tratta di due vigneti che rappresentano per caratteristiche morfologiche e gestionali la collina del sottobacino ovvero una delle aree maggiormente vitate della Sicilia. Il fine è valutare la sostenibilità della gestione del suolo in termini di controllo dell’erosione (perdita di suolo), attraversol'applicazione del modello USLE (Universal Soil Loss Equati…