Search results for " mobility"
showing 10 items of 577 documents
Electronic functionality of Gd-bisphthalocyanine: Charge carrier concentration, charge mobility, and influence of local magnetic field
2018
Abstract Gadolinium bisphthalocyanine (GdPc2) has been placed among the highest ranked molecular materials considered namely for modern optoelectronic applications including organic solar cells. To improve understanding of the correlation between GdPc2 magnetic properties and its electronic functionality, we experimentally and theoretically studied charge carrier concentration, charge mobility, and influence of local magnetic field on charge carrier transport. For better clearance, all the main studied properties of GdPc2 bisphthalocyanine were compared with Zn phthalocyanine (ZnPc) as a reference material. Conductivity and charge carrier mobility were measured in materials incorporated in …
Photoconductivity and photovoltaic effect in indium selenide
1983
Transport and phototransport properties of crystalline indium monoselenide (InSe) doped with a variety of elements are reported. Measured mobilities, lifetimes, and effective diffusion lengths of photoexcited carriers are used to interpret electrical and photovoltaic properties of several different structures. These include p‐n junctions, bismuth/p‐type InSe, platinum/n‐type InSe, and indium tin oxyde (ITO)/p‐type InSe. External solar efficiencies of the best devices are between 5% and 6%. The influence on the efficiency of the various parameters is evaluated, and ways of improvement are discussed.
Impact of cloud processes on aerosol particle properties: results from two ATR-42 flights in an extended stratocumulus cloud layer during the EUCAARI…
2011
Abstract. Within the European Aerosol Cloud Climate and Air Quality Interactions (EUCAARI) project, the Meteo France research aircraft ATR-42 was operated from Rotterdam airport during May 2008, to perform scientific flights dedicated to the investigation of aerosol-cloud interactions. Therein, the objective of this study is to illustrate the impact of cloud processing on the aerosol particles physical and chemical properties. The presented results are retrieved from measurements during a double-flight mission from Rotterdam (Netherlands) to Newcastle (UK) and back using data measured with compact Time of Flight Aerosol Mass Spectrometer (cToF-AMS) and Scanning Mobility Particle Sizer (SMPS…
Strategie e contro-strategie per una città a misura d’uomo?
2018
Le strategie che da qualche anno vengono messe in campo per “costruire” città sostenibili si confrontano con i temi ambientali declinati in differenti campi. Tra questi, certamente, quello della mobilità riveste un ruolo chiave. Per tale ragione le città da tempo si stanno dotando di Piani per la mobilità sostenibile puntando sul rafforzamento del trasporto pubblico e sulle piste ciclabili. La città di Palermo, nell’ottica di migliorare e integrare i vari sistemi di trasporto, ha redatto diversi progetti di infrastrutture per le piste ciclabili finalizzati a un cambiamento delle abitudine delle persone, con conseguenti benefici ambientali. Questi progetti agiscono fortemente sugli spazi urb…
EMPLOYMENT OF CATIONIC SOLID-LIPID NANOPARTICLES AS RNA CARRIERS
2007
Gene transfer represents an important advance in the treatment of both genetic and acquired diseases. In this article, the suitability of cationically modified solid-lipid nanoparticles (SLN) as a nonviral vector for gene delivery was investigated, in order to obtain stable materials able to condense RNA. Cationic SLN were produced by microemulsion using Compritol ATO 888 as matrix lipid, Pluronic F68 as tenside, and dimethyldioctadecylammonium bromide (DDAB) as cationic lipid. The resulting particles were approximately 100 nm in size and showed a highly positive surface charge (+41 mV) in water. Size and shape were further characterized by scanning electron microscopy (SEM) measurements. M…
Impact of hydrothermal alteration processes on element mobility and potential environmental implications at the Sousaki solfataric field (Corinthia -…
2020
Abstract Samples of efflorescences and encrustations of hydrothermal origin were collected at Sousaki (Greece) and analysed for their mineralogical (XRD) and chemical composition. Solutions obtained both from mineralization with HNO3 and from leaching with deionised water were analysed for major (ICP-OES), minor and trace metals (ICP-MS) and sulfate contents (IC). Results evidence the dependence of the chemical and mineralogical composition on micro-environmental conditions i.e. humidity, oxygen-rich or -poor environment, exposed or sheltered from meteoric agents. In fact, the presence of highly soluble sulfate minerals with elevated contents of many metals (e.g. Mg, Al, Fe, Mn, Cr, Ni, etc…
Natural emotion: progetti di itinerari naturalistici e nuovi accessi al patrimonio archeologico di Tindari
2019
The exceptional orographic and natural conditions, together with the cultural and patrimonial ones, of our territory have become the landscape of relations between the spaces where silence, slowdown and acceleration define the urban and human imagination of the territories of the very different minor centers among them by topographical location, by cultural and linguistic traditions and specificities. What future for the smaller centers? This is one of the questions of the contribution that it intends to face closely the role of the architectural project in the fragile territory of the minor centers where it is possible to find the constants in the critical issues of the participants that c…
La inmigración y el género como factores clave de la movilidad educativa en España
2021
En este trabajo analizamos los determinantes del logro educativo para la población inmigrante en España, así como su grado de movilidad intergeneracional educativa, comparando estos resultados con el resto de residentes en nuestro país. Como fuente de información, utilizamos la encuesta EU-SILC de 2011, que incluye un módulo de transmisión intergeneracional de pobreza. Gracias a este módulo, podemos conocer el nivel académico de los progenitores y compararlo con el alcanzado por sus hijos. Para analizar los determinantes del logro educativo, utilizamos una estimación de máxima verosimilitud, teniendo en cuenta variables del propio individuo, de su familia y de su entorno, mientras que el es…
Effects of Mobility Programmes on University Students' Academic Performance
2018
The number of students participating in mobility programmes has increased enormously over the years. The reasons are diverse and may range from personal growth to better employability prospects, together with improvement in foreign language skills and intercultural awareness. Mobility programmes receive generous funding from the European Commission, therefore their outcomes should be measured and evaluated. This paper focuses on a specific one: the academic effects of mobility programmes. We analyse whether there is an improvement in the academic performance of the students who participate in mobility programmes and, if this is the case, whether it is sustained over time. We use a broad dat…
Mobilità urbana e topografia: quattro progetti per Petralia Sottana
2013
Urban mobility and topography:four projects for Petralia Sottana. Many villages on the Madonie mountains share some material and non-material conditions: a complex articulation of the territorial altimetry,which often generates extraordinary landscape sites; a widespread population decrease (up to 50% in the last decades); the increasing relocation of inhabitants from the historical centre to peripheral areas; the difficult conciliation of both private and public traffic with the historical urban context; a deficit in the natural cycle of substitution and renovation of historical buildings and of public spaces. Four urban projects have been elaborated by the department of Architecture of Pa…