Search results for "competition."
showing 10 items of 1367 documents
Food selection of a generalist herbivore exposed to native and alien seaweeds
2018
Understanding which factors influence the invasion of alien seaweed has become a central concern in ecology. Increasing evidence suggests that the feeding preferences of native herbivores influence the success of alien seaweeds in the new community. We investigated food selection of a generalist native grazer Paracentrotus lividus, in the presence of two alien seaweeds (Caulerpa cylindracea and Caulerpa taxifolia var. distichophylla) and two native seaweeds (Dictyopteris membranacea and Cystoseira compressa). Sea urchins were fed with six experimental food items: C. cylindracea, C. taxifolia var. distichophylla, a mixture of C. cylindracea and C. taxifolia var. distichophylla, D. membranace…
Characterization of mitotic chromosomes of four species of the genus Diplodus: Karyotypes and chromosomal nucleolar organizer region phenotypes
1996
Karyotypes have been described in four Mediterranean species of the genus Diplodus (Teleostei, Sparidae), D. vulgaris, D. puntazzo, D. sargus and D. annularis. Chromosomes were mainly acrocentric in all but D. vulgaris, where certain chromosome pairs were subtelocentric. A remarkable intraspecific heteromorphism in the number of NOR-bearing chromosomes along with a substantial interspecific variability in position of chromosomal Ag signals have been encountered. The presumed origin of multiple NOR-bearing chromosomes in Diplodus species and variation of the NOR location is discussed. ? 1996 The Fisheries Society of the British Isles
Enhancer, chromatin insulator, non-coding RNA and α-histone gene expression during embryogenesis of the sea urchin Paracentrotus lividus.
2009
Core promoters and chromatin insulators (ins) may direct a transcriptional enhancer (enh) to prefer a specific promoter in complex genetic loci. Enh and ins flank the sea urchin Paracentrotus lividus α-histone H2A transcription unit in a tandem repeated cluster containing the five histone genes. In vivo competition assays of enh and ins functions reveal that the H2A enh-bound MBF-1 activator participates also in the expression of the H3 gene and that the sns5 ins buffers the downstream H1 promoter from the H2A enh. These results suggest that both the H2A enh and the sns5 ins may account for the diverse accumulation of the linker vs core nucleosomal histones during early development of the s…
DIDATTICA E CONCORSI INTERNAZIONALI: OBIETTIVI, METODI ED ESPERIENZE
2018
La memoria presenta nell’ambito di un più ampio panorama europeo sulla questione delle metodologie per la didattica universitaria nelle scuole di Ingegneria ed Architettura, gli esiti di una collaborazione avviata nel 2005 tra il Politecnico di Milano – Polo Regionale di Lecco e l’Università degli Studi di Palermo che ha avuto come oggetto la partecipazione di docenti e studenti provenienti da Atenei Europei ed Asiatici ad un Concorso Internazionale di Progettazione Sostenibile. Le tematiche affrontate durante questo decennio di collaborazione sono state l’occasione per fornire un contributo al dibattito, attualmente in corso, nell’ambito dell’Ingegneria Edile-Architettura che, proprio in q…
Palermo University and Compasso Volante
2014
The University of Palermo joins since few years the Compasso Volante Competition, that is still keeping, in different ways, its original spirit. The city of Palermo has represented in two different Editions the project site and, last year, Palermo hosted for the second time the Award Ceremony. Palermo has been made available to the awarding of the XV Edition, thanks to the enthusiasm and pleasure that students and professors have shown in the past. The paper present the result of the Edition that has take place in Macau, Hong Kong, Milano and Palermo.
Demand for quality and design ideas competition: experimentation to discover good practices / Domanda di qualità e concorso di idee: una sperimentazi…
2013
La procedura del concorso d’idee è indicata come soluzione per contribuire all’innalzamento della qualità architettonica. In Italia le esperienze durante l’ultimo decennio sono state numerose, ma non sempre hanno sortito positivi esiti concreti. Se le procedure di richiamo internazionale si riferiscono a linee guida consolidate, per la maggior parte delle occasioni di rilievo locale il livello di attenzione è insufficiente a garantire una diffusa qualità dei risultati. La partecipazione ai lavori di una commissione giudicatrice è stata colta come occasione utile a sperimentare, fuori da ambiti accademici, un approccio improntato dalla cultura tecnologica della progettazione. Per quanto circ…
I concorsi del '68 per le nuove chiese a Palermo
2015
Negli anni Sessanta l’espansione di Palermo dal centro verso le periferie è già iniziata. Fin dai piani di ricostruzione all’indomani della guerra, la nascita dei quartieri di edilizia residenziale pubblica conferisce alla città un nuovo volto, cingendo interamente il nucleo antico e modificandone la crescita che, dal piano Regalmici, aveva visto nell’asse di via Libertà e quindi nella direzione nord la direzione preferenziale di sviluppo. La crescita pluridirezionale è accentuata dal Piano Regolatore del 1962, che individua da nord a sud otto macroaree di espansione lungo la traccia della nuova circonvallazione. Due concorsi aprono la nuova stagione dell’architettura religiosa a Palermo; i…
An Ambient Intelligence Architecture for Extracting Knowledge from Distributed Sensors
2009
Precisely monitoring the environmental conditions is an essential requirement for AmI projects, but the wealth of data generated by the sensing equipment may easily overwhelm the modules devoted to higher-level reasoning, clogging them with irrelevant details. The present work proposes a new approach to knowledge extraction from raw data that addresses this issue at different levels of abstraction. Wireless sensor networks are used as the pervasive sensory tool, and their computational capabilities are exploited to remotely perform preliminary data processing. A central intelligent unit subsequently extracts higher-level concepts represented in a geometrical space and carries on symbolic re…
A Frequency-based Approach for Features Fusion in Fingerprint and Iris Multimodal Biometric Identification Systems
2010
The basic aim of a biometric identification system is to discriminate automatically between subjects in a reliable and dependable way, according to a specific-target application. Multimodal biometric identification systems aim to fuse two or more physical or behavioral traits to provide optimal False Acceptance Rate (FAR) and False Rejection Rate (FRR), thus improving system accuracy and dependability. In this paper, an innovative multimodal biometric identification system based on iris and fingerprint traits is proposed. The paper is a state-of-the-art advancement of multibiometrics, offering an innovative perspective on features fusion. In greater detail, a frequency-based approach result…
They are looking at me! Understanding how Audience Presence Impacts on Public Display Users
2017
It is well known from prior work, that people interacting as well as attending to a public display attract further people to interact. This behavior is commonly referred to as the honeypot effect. At the same time, there are often situations where an audience is present in the vicinity of a public display that does not actively engage or pay attention to the display or an approaching user. However, it is largely unknown how such a \textit{passive audience} impacts on users or people who intend to interact. In this paper, we investigate the influence of a passive audience on the engagement of people with a public display. In more detail, we report on the deployment of a display in a public s…