Search results for "rius"

Feasibility issues in static output-feedback controller design with application to structural vibration control

2014

Recent results in output-feedback controller design make possible an efficient computation of static output-feedback controllers by solving a single-step LMI optimization problem. This new design strategy is based on a simple transformation of variables, and it has been applied in the field of vibration control of large structures with positive results. There are, however, some feasibility problems that can compromise the effectiveness and applicability of the new approach. In this paper, we present some relevant properties of the variable transformations that allow devising an effective procedure to deal with these feasibility issues. The proposed procedure is applied in designing a static…

Chironomus riparius exposure to fullerene-contaminated sediment results in oxidative stress and may impact life cycle parameters

2015

A key component of understanding the potential environmental risks of fullerenes (C60) is their potential effects on benthic invertebrates. Using the sediment dwelling invertebrate Chironomus riparius we explored the effects of acute (12 h and 24 h) and chronic (10 d, 15 d, and 28 d) exposures of sediment associated fullerenes. The aims of this study were to assess the impact of exposure to C60 in the sediment top layer ((0.025, 0.18 and 0.48) C60 mg/cm2) on larval growth, oxidative stress and emergence rates and to quantify larval body burdens in similarly exposed organisms. Oxidative stress localization was observed in the tissues next to the microvilli and exoskeleton through a method fo…

Scrittore epicureo anonimo, Opera incerta (PHerc. 1390/908). Edizione, introduzione e commentario, tavole

2019

Il singolare scritto adespoto e anepigrafo trasmesso da PHerc. 1390/908 e convenzionalmente definito ‘Sulla procreazione’ o ‘Sulla generazione’ rappresenta per il suo soggetto un unicum nella collezione ercolanese – dove, com’è noto, non trovano posto opere di natura medica o paramedica – e insieme alla sezione conclusiva del IV libro del De rerum natura di Lucrezio, l’unica trattazione epicurea di una certa estensione sul tema. Di esso, tradizionalmente assegnato a Epicuro e ora attribuito al filosofo epicureo Demetrio Lacone (II secolo a.C.), si propone in questa sede la prima edizione critica complessiva munita di introduzione e commento. The peculiar anonymous text handed down by PHerc.…

recensione a:FABIO DI GIANNATALE (a cura di), Escludere per governare. L’esilio politico fra Medioevo e Risorgimento, prefazione di Marcello Fantoni,…

2013

La recensione offre un'analisi critica del volume che raccoglie le relazioni presentate al Convegno internazionale di Studi Escludere per governare, organizzato a Teramo nell’ottobre del 2009, nell’ambito di un progetto ideato dal curatore Fabio Di Giannatale e da Marcello Fantoni.

L'ex convento e carcere di San Vito di Agrigento. Studi e proposte per la sua conservazione

2020

Il saggio “L’ex convento carcere di San Vito di Agrigento. Studi sulle trasformazioni e proposte per la sua conservazione” indaga l’antico convento dei frati Minori di Agrigento, trasformato nel sec. XIX in carcere di Agrigento. Il convento, costruito fuori le mura della città, era costituito dalla chiesa, dal chiostro e dal convento con le celle e gli spazi comuni dei frati. La nuova destinazione a carcere, con i lavori effettuati tra la metà del sec. XIX, primi e metà del sec. XX, ha in parte distrutto e occultato il convento medievale. Nell’Anno Accademico 2011-2012, i due corsi di Laboratorio di Restauro e Teoria e Storia del Restauro, del Corso di laurea in Architettura, sede di Agrige…

Founder population size and number of source populations enhance colonization success in waterstriders.

2002

Understanding the factors that underlie colonization success is crucial both for ecological theory and conservation practices. The most effective way to assess colonization ability is to introduce experimentally different sets of individuals in empty patches of suitable habitat and to monitor the outcome. We translocated mated female waterstriders, Aquarius najas, into 90 streams that were not currently inhabited by the species. We manipulated sizes of propagules (from 2 to 16 mated females) and numbers of origin populations (one or two). Three origin populations were genetically different from each other, but they were less than 150 km from the streams of translocation. The results demonst…

Genome instability ofChironomus ripariusMg. andChironomus pigerStrenzke (Diptera, Chironomidae)

2007

Intra and interspecific variation was evaluated in two Bulgarian populations (Pancharevo and Koka- lijane) of the two sibling and homosequential species Chironomus riparius Mg. and Chironomus piger Strenzke, by analyzing structural and functional alterations in salivary gland polytene chromosomes. In both species genome in- stability was demonstrated, which was expressed by structural and functional somatic chromosomal alterations. In the C. riparius population from Pancharevo, living in sediments containing high concentrations of Cu, Pb and Zn, salivary gland cells containing somatic rearrangements appeared at a significantly higher frequency (51.92%) than in the Kokalijane C. piger popula…

Where to Spend the Winter in Serra Da Estrela? the First Record ofDiphyus quadripunctorius(Mueller, 1776) Overwintering in a Subterranean Habitat in …

2013

Where to Spend the Winter in Serra Da Estrela? the First Record ofDiphyus quadripunctorius(Mueller, 1776) Overwintering in a Cave Habitat in Portugal…

2013

Ecotoxicity of sediments in rivers: Invertebrate community, toxicity bioassays and the toxic unit approach as complementary assessment tools

2015

The determination of the real toxicity of sediments in aquatic ecosystems is challenging and necessary for an appropriate risk assessment. Different approaches have been developed and applied over the last several decades. Currently, the joint implementation of chemical, ecological and toxicological tools is recommended for an appropriate and successful toxicity risk assessment. We chose the combination of the toxic unit approach with acute pore water tests (Vibrio fischeri, Pseudokirchneriella subcapitata and Daphnia magna) and whole-sediment exposure tests (V. fischeri, Chironomus riparius), together with invertebrate community composition (multivariate analyses) to detect short and long-…