Search results for "passiv"
showing 10 items of 512 documents
The southern Tyrrhenian Sea margin an example of lithospheric scale strike-slip duplex
2010
The southern Tyrrhenian Sea margin is dominated by deformations whose kinematics are relatively poorly constrained, and different models have been proposed to account for its recent evolution. Analysis of new structural and space geodesy data, combined with available geophysical information, reveal a deformation field characterised by subhorizontal NW-SE directed shortening and SW-NE directed extension. The main recognised regional-scale structure comprises E-W trending fault zones, namely the Ustica-Eolie Line and the Mt. Kumeta-Alcantara Line, connected by the NW-SE trending Marettimo, Trapani, San Vito, Palermo, Gratteri-Mt. Mufara and Eolie faults. This fault network displays a remarkab…
Evaluation of the indoor comfort of the Arabic-Norman architecture for its valorization
2018
Nel 2015 il percorso arabo normanno di Palermo, Cefalù e Monreale è stato riconosciuto patrimonio dell’Umanità. Tra i monumenti del percorso la Zisa costituisce un esempio straordinario di tipologia edilizia con caratteristiche tecnologiche ed ambientali uniche perché, originariamente, era caratterizzato dall'integrazione di alcuni sistemi passivi per il miglioramento del comfort ambientale interno. Fu costruito nel 1160 da artigiani arabi. Era caratterizzato dalla presenza di un sistema di raffreddamento evaporativo e ventilazione naturale che garantiva livelli di comfort che potevano essere soddisfacenti anche ai giorni nostri. La ricerca propone i risultati ottenuti attraverso l’applicaz…
Effect of three different irrigation solutions applied by passive ultrasonic irrigation
2015
Objectives This study evaluated the maximum depth and percentage of irrigant penetration into dentinal tubules by passive ultrasonic irrigation (PUI). Materials and Methods Thirty extracted human teeth were instrumented and divided into three groups. According to final irrigation regimen, 5.25% sodium hypochlorite (Group A, NaOCl), 2% chlorhexidine (Group B, CHX) and saline solution (Group C, control group) were applied with Irrisafe 20 tips (Acteon) and PUI. Irrigant was mixed with 0.1% rhodamine B. Sections at 2 mm, 5 mm, and 8 mm from the apex were examined with confocal laser scanning microscopy (CLSM). The percentage and maximum depth of irrigant penetration were measured. Kruskal-Wall…
A facies distribution model controlled by a tectonically inherited sea bottom topography in the carbonate rimmed shelf of the Upper Tithonian–Valangi…
2016
The Upper Tithonian–Valanginian shallow-water carbonates outcropping in the Palermo Mts (NW Sicily) consist of several facies associations reflecting different depositional environments of a carbonate rimmed shelf, pertaining to the Southern Tethyan continental margin. The reconstructed depositional model, based on the sedimentological features, cyclic facies arrangement and biota distribution, shows that a wide protected lagoon, dominated by algae, molluscs and scattered patch reefs, was bordered landward by a tidal flat, where stromatolitic algal mats were cyclically subaerial exposed, and seaward by a marine sand belt and reef complex. Oolitic packstone-grainstone lithofacies, cyclically…
Housing Affordability in Metropolitan Areas. The Application of a Combination of the Ratio Income and Residual Income Approaches to Two Case Studies …
2017
Housing affordability problems have become more serious over the course of the last few decades and are now also affecting the middle-class, despite the fall in prices on the housing market. This study proposes a methodology to assess threshold-income as an index for measuring housing affordability by applying a combination of the ratio income and residual income approaches. The methodology is applied to two particular areas of Sicily in Italy as case studies consisting of medium-size metropolitan areas located in a less developed European region. The areas have been chosen on the basis of their different territorial structure: a polarized area that comprises a high-density city centre and …
Housing Affordability for Urban Regions
2021
Urban regions are recognised as driving forces of the global economy as well as the main sources of social inequality. In recent decades, particularly, housing access has become a serious problem, not only for the most disadvantaged population, but also for the middle class, as a result of economic crises and despite of prices decline in the housing market. In urban regions with high population density, some social groups face problems of housing affordability that depend not only on market prices but also on income availability. The contribution proposes a methodology for income-threshold assessment through a combination between the ratio income and the residual income approaches, which is…
Structural Vibration Control for a Class of Connected Multistructure Mechanical Systems
2012
Published version of an article from the journal: Mathematical Problems in Engineering. Also available from the publisher:http://dx.doi.org/10.1155/2012/942910 A mathematical model to compute the overall vibrational response of connected multistructure mechanical systems is presented. Using the proposed model, structural vibration control strategies for seismic protection of multibuilding systems can be efficiently designed. Particular attention is paid to the design of control configurations that combine passive interbuilding dampers with local feedback control systems implemented in the buildings. These hybrid active-passive control strategies possess the good properties of passive contro…
Active-passive control strategy for adjacent buildings
2011
Author's version of a chapter in the book: 2011 Proceedings of the American Control Conference. Also available from the publisher at: http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=05991059 In this paper, a control strategy to mitigate the vibrational response of adjacent buildings under seismic excitation is presented. The proposed strategy combines inter-building passive actuators with active actuators placed in the building stories. The main ideas are presented by means of a simplified two-building model; however, a semi-decentralized overlapping approach via the inclusion principle has been used to impose a proper information exchange structure suitable for wireless control of larg…
Ciešamās kārtas lietojums zinātnisko rakstu un bakalaura darbu anotācijās
2019
Pētījuma tēma ir ciešamās kārtas lietojums anotācijās. Ciešamā kārta dzimtās un svešvalodas akadēmiskajos rakstos ir pētīta pirms (Hinkele, 2004); taču to lietojums anotācijās netiek pētīts. Šis pētījums attiecas uz ciešamās kārtas analīzi angļu kā svešvalodas studentu bakalaura darbu anotācijās un pētnieku zinātnisko rakstu anotācijās. Teorētiskais pamatojums ir balstīts uz Kvirka (Quirk et al., 1985), Baibera (Biber et al.,1999), Hadlestona un Pulluma (Huddleston un Pullum 2005), Kollinas un Hollo (Collins un Hollo 2010) un citu autoru darbiem. Pētījums ietver aprakstošās un secinošās statistikas rīkus un specializētā korpusa piemēru kvalitatīvās analīzes aspektus. Rezultātu aprakstā ir a…
No tēmas atkarīgs ciešamās kārtas lietojums angļu valodas korpusos
2015
Ir zināms, ka ciešamā kārta tiek bieži vien pielietota lietišķajā stilā, bet tā nav tik bieži sastopama mutvārdu saziņā, bet vai ciešamās kārtas lietojums var atšķirties atkarībā no tēmas? Bakalaura darbā tika analizēts ciešamās kārtas lietojums atkarībā no materiāliem, kas var tikt atrodami korpusos. Darba hipotēze ir tāda, ka dažādos tematos ciešamās kārtas lietojums atšķiras. Lai pārbaudītu izvirzīto hipotēzi un sasniegtu izvirzīto pētījuma mērķi, tika izpētīti rakstītie avoti un agrāk veikti pētījumi par ciešamo kārtu un tās lietojumu. Pētījuma praktiskajai daļai tika izvēlēti pieci darbības vārdi un tie tika sameklēti trīs dažādos angļu valodas korpusos, izmantojot tiešsaistes programm…