196 research outputs found
Leaf partitioning of the seagrass Posidonia oceanica between two herbivores: is Sarpa salpa herbivory underestimated because of Paracentrotus lividus grazing?
No full textIn the Mediterranean region, herbivory appears to be a factor controlling the production of the endemic species Posidonia oceanica, which is mainly due to two main macroherbivores: the sea urchin Paracentrotus lividus, and the sparid fish Sarpa salpa. In this context the present study is a contribution in clarifying herbivory on P. oceanica by testing: 1) whether the abundance of grazing marks of the two herbivores is variable across different spatial scales, 2) whether spatial variation of P. lividus grazing marks and its density is consistent, 3) whether there is a dependence of the number of P. lividus grazing marks on its density, 4) whether the grazing of both macroherbivores, P. lividus and S. salpa, involves the entire leaf length, and 5) whether there is a dependence of the number of P. lividus grazing marks on the number of S. salpa grazing bites.
With this aim, the density of Paracentrotus lividus was estimated at six different locations around the Gulf of Alghero (Northwestern Sardinia, Italy). At each location, two areas were considered and within each area the number of P. lividus individuals was counted in 10 plots of dimensions 1 × 1 m each. The abundance of P. lividus and Sarpa salpa grazing marks was estimated on two shoots harvested at random in each plot. The number of P. lividus individuals varied greatly among the locations and between areas within each location. A sigmoid function was found to better describe the relation between P. lividus density and the number of its grazing marks. The distance class-frequency distribution of P. lividus grazing marks from the leaf base showed that this herbivore affected the length of the Posidonia oceanica leaf for about 700 mm, and that the attacks were concentrated at the lower portion of the leaf near the base. Conversely, a larger number of the S. salpa grazing bites were more frequently seen on the higher portions of the leaves, although attacks were found along the entire length. The reported data suggest that the two herbivores share the seagrass by partitioning the portions of the leaf they consume
Volere è potere? Sesto e conclusivo episodio
No full text<p><strong><span>Area filosofica, gran finale e sorpresa natalizia: dalle 10:00 alle 12:30</span></strong></p>
<p><strong>2 dicembre: Antonio Cecere, Moira De Iaco, Paolo Ercolani, Sara Chessa</strong></p>
<p><strong>Conduzione: Davide Orlandi</strong></p>
<p><strong> Ultimo e conclusivo episodio del convegno online multidisciplinare che ha indagato il tema della volontà sotto differenti aspetti e ambiti. In memoria di Gianni Vattimo e di Fulvio Sguerso.</strong></p>
Fault-Diagnosis of Grid Structures
No full textTheprobl] offaul diagnosis in grid-connected systems is considered. A diagnosisalnosisFI caln DAGS and based on the PMCmodel is presented. DAGS provides a diagnosis which is shown to be correct, alrect, possibl incomplB[I if thecardinalq; of theactual faul set isbelB a bound T # , dependent of theactual syndrome #. A bound T independent of # is alF derived by a worst-caseanalt-c covering the cases oftriangul;; square,hexagonal and octagonal grids. T is shown to be #(n ), where n is the size of the system, for al the grids considered. c 2002El2FB#I Science B.V.Al rights reserved. Keywords: FauleDFBVU#IFqV Faul diagnosis;System-l;FV diagnosis;Paralos architectures 1. I363S-222 Faul diagnosis is of primary importance to provide highdependabilBk incomplE systems. It aims at identifying the(faul] ornon-faulB] state of the units composing a system. Upon identi#cation,fault units may be eitherreplrF; orisolEIB from the rest of the system, andfaul recovery or recon#guration techniques may be used to restore a coherent state,alte,FB the system to resume operation,possibl with reduced performance (graceful degradation). System-l-T( diagnosis was introduced by Preparata et al [14] and has beendeepl investigated in lBI#]VFqBE It aims at diagnosing systems composed by units(usualE processors), with the requirement that they are abl to test each other by exchanging information through point-to-pointbi-directional li-di A system is represented by the system graph G=(N; L), an undirected graph where node set N represents units and # Corresponding author. Instituto diElB;;BFq;E] del;;BFq;E]BFl; del CNR, Via S. Maria 46, 56126, Pisa,ItalB E-mail address: [email protected] (S. Chessa). 0304-3975/02/$ - see front matter c 2002El2FVVU Science B.V.Al rights reserved. PII: S0304-3975(..
Arredi di carta: i disegni per mobili della manifattura Lenci
No full textLa manifattura Lenci, fondata a Torino nel 1919 da Elena König e dal marito Enrico Scavini, si specializzò nella creazione di pupazzi e bambole in stoffa colorata, giocattoli in legno, capi di vestiario e articoli di moda, affiancando a questi anche una più ristretta produzione di mobili per camere di bambini e decorazioni per l’arredamento, progettati dai principali artisti chiamati nel corso degli anni a collaborare con la ditta. Il contributo analizza le invenzioni di Gigi Chessa, Mario Sturani e Giuseppe Porcheddu attraverso un corpus di disegni e di progetti tecnici conservati presso una collezione privata torinese, che consentono di mettere in evidenza la compresenza all’interno del repertorio Lenci di diversi orientamenti stilistici, partendo da arredi ispirati a forme e modelli del passato per arrivare alle sperimentazioni più vicine alle novità del Déco internazionale, fino a giungere alla tipica produzione in stile Lenci, caratterizzata da colori brillanti, forme originali e riferimenti iconografici desunti dal mondo delle fiabe e dell’infanzia
Unsupervised human process discovery in smart homes
No full textThe advances in the Internet of Things (IoT) have enabled the automation of various tasks like switching on the heating at home from work, seeing who is at your front door from the couch, supporting nurses in elderly homes, or the efficient delivery of packages. By enabling the connection between the physical and digital worlds, the IoT has shown how environments can be augmented with technology to enhance their capabilities, making them more intelligent, responsive, and adaptive. This widespread adoption of embedded systems turned pervasive (or ubiquitous) computing into reality: while sensors gather real-time data about the environment, actuators are used to automate the execution of many tasks that help the users of such environments. These environments, referred to as smart environments or smart spaces, represent an emerging class of IoT-based applications and are centered on their human users. Among smart spaces, smart homes and offices are representative examples. The goal is to enhance the quality of life, improve productivity, and provide personalized services by understanding and responding to the needs and preferences of the users, realizing the paradigm known as Ambient Intelligence (AmI). The literature presents various definitions of AmI systems and a set of distinct features that characterize them: sensitivity, responsiveness, adaptivity, ubiquity, and transparency. Sensitivity pertains to the AmI system's ability to perceive and comprehend the surrounding environment and its interaction context. Responsiveness and adaptivity, closely tied to sensitivity, indicate the system's capacity to promptly react, either proactively or reactively, to changes in the context in accordance with user preferences. Collectively, sensitivity, responsiveness, and adaptivity contribute to the overarching concept of context awareness. Lastly, the terms ubiquity and transparency directly relate to the idea of pervasive computing. Smart environments process and analyze the data collected from sensors to extract meaningful information. In this context, AmI is realized by utilizing techniques such as machine learning, artificial intelligence, and human-computer interaction (HCI). The rich data automatically collected via IoT sensors in smart spaces is used to get insights about the human behavior of the user (e.g., sleep tracking) or to perform automated actions for the user (e.g., automatically opening the blinds). For instance, current applications of human behavior monitoring in smart spaces include smart thermostats (e.g., Google Nest Learning Thermostat) and ambient assisted living (e.g., elderly fall detection systems). Modeling human activities and habits is not a simple task, due to the flexible and unstructured nature of human behavior. Recently, although it is still difficult to represent them following a precise flow of tasks, approaches have been proposed that model human habits as workflows. In particular, the research community and manufacturers have shown a great interest in applying process mining (PM) to smart spaces. Process mining is a fairly recent research discipline that combines data mining techniques with techniques used in Business Process Management (BPM), such as process modeling and process analysis. Process mining aims to extract, monitor, and improve processes based on real-world data. In particular, process discovery is a process mining technique used to discover and generate the process model describing the underlying behavior shown in the event log. The mined process model can be visualized in different forms, such as Petri nets, process flowcharts, or BPMN diagrams. Visualization helps to understand the structure and dynamics of processes within the smart space. However, even though process models could be extracted from smart space data, multiple important challenges arose. This thesis presents an overview of how some of the aforementioned research challenges are handled and to what degree they are addressed by the author
Perspectivas de género en la traducción de la obra de las mujeres poetas de las Vanguardias españolas
No full textThe main aim of this research is to provide an analysis of the Italian translation of the poetry of a group of female authors of the Spanish Avant-garde movements, combining the theory of poetic translation with gender studies in translation. The translated poems that I analyze in this thesis are my own translations of some of Concha Méndez's, Ernestina de Champourcin's, Josefina de la Torre's, Rosa Chacel's, Cristina de Arteaga's and Lucía Sánchez Saornil’s works.The stated goal is to find a middle way between the radical strategies outlined by the Canadian feminist movement during the Eighties (cf. Diaz- Diocaretz 1985, Chamberlain 1988, 1998 , 1990 Godard, de Lotbiniere-Harwood 1991, Von Flotow 1991,1997, Simons 1996), and the translation techniques that are required to recreate the features of a poem without betraying the style and the aesthetics of the author (cf. Holmes 1969, 1978, Lefevere techniques 1975, Popovic 1976 Beaugrande 1978, Etkind 1982, Raffel 1988). My translation practice demonstrates that in order to translatein the feminineit is necessary to take a step further and introduce other important features that contribute to distinguish female discourse. Moreover, I will analyse the perspectives opened by the great feminist challenge in translation, and on the role of literature and translation in the rise of a new sensitivity in the female question
Variabilità della distribuzione di Paracentrotus lividus nell’area marina protetta di Capo Caccia-Isola Piana: interazione tra l’effetto delle restrizioni sul prelievo e quello dell’accessibilità
No full textLo scopo di questo studio è di stimare se nell’habitat roccioso l’effetto
delle restrizioni sulla raccolta di Paracentrotus lividus interagisca con l’accessibilità dei siti. Sono stati individuati 16 siti attribuiti
in gruppi di quattro a quattro differenti combinazioni di restrizioni ed accessibilità: 1) zona B distante (D), e 2) zona B vicina (V) ai porti
(aree accessibili solo in barca per la caratteristica costa a strapiombo sul mare, B-barca-D e B-barca-V, rispettivamente), 3) zona C (C), e
4) zona fuori dell’AMP (F) facilmente accessibili dalla costa tramite auto (rispettivamente C-auto e F-auto). Queste quattro combinazioni
corrispondono ad un gradiente di potenziale attività umana che può influire sulla distribuzione di P. lividus nel seguente ordine: B-barca-D
(molto bassa), B-barca-V (bassa), C-auto (moderata) e F-auto (alta). In ciascun sito è stata considerata la profondità dai 3 ai 7 m, e per ciascun
sito sono state scelte due aree di circa 100 m2, dove è stata misurata la taglia del dermascheletro di 100 individui. Dai risultati ottenuti
sono emerse differenze significative tra le quattro combinazioni di restrizioni × accessibilità, suggerendo che la percentuale degli individui
maggiori di 50 mm è maggiore nei siti raggiungibili con la barca rispetto a quelli facilmente raggiungibili con l’auto.This study is aimed at investigating whether the effects of harvest restrictions of Paracentrotus
lividus, occurring in rocky reef habitats, interact with the accessibility of locations. P. lividus was sampled at sixteen locations and attributed
in groups of four to 4 combinations of MPA harvest restrictions 1) B zone, 2) C zone and 3) Outside the MPA and accessibility
(boat vs. car), corresponding to a gradient of potential human activity on P. lividus in the ranked order of very low (B-boat-D), low (Bboat-
V), moderate (C-car), and high (F-car). Sampling were done at the depth range of 3-7 m at each location in two 100 m2 areas. The
size of P. lividus (test diameter without spines) was the response variable considered. Human activity has been found to significantly affect
population structure of P. lividus influencing the proportion of individuals larger than 50 mm. Although harvest was restricted by MPA
regulations, a significantly lower abundance of large individuals was found at sites accessible by car. This result highlights that there is an
effect of harvest restrictions in relation to accessibility and emphasizes the need to carefully address the enforcement of the MPA toward
easily accessible sites
Herbivory on the seagrass Posidonia oceanica: indirect estimates of grazing by Paracentrotus lividus and Sarpa salpa
No full textSAFETY AND EFFICACY OF PEG-IFN alpha 2a AND RIBAVIRIN FOR TREATMENT OF HEPATITIS C IN SARDINIAN ADULT PATIENTS WITH THALASSEMIA MAJOR: A SINGLE CENTRE REAL LIFE EXPERIENCE
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