990 resultados para Elétrodos seletivos de ião


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La lingua di Una questione privata e de La vita agra, vista come costruzione culturale condizionata dal contesto, sarà l’oggetto di questo lavoro. L’accento sarà messo sulla sua capacità di andare oltre la mera definizione del dizionario e condizionare il lettore, avvicinandolo ai personaggi. In particolare, si studierà la presenza di termini nella loro lingua originale, come mezzo per permettere al lettore di trovarsi sulla stessa lunghezza d’onda dei personaggi e di avere la loro stessa percezione della realtà. Effettivamente, nei due romanzi scelti, le lingue straniere hanno un forte rilievo, che se nell’opera di Fenoglio si nota soprattutto a livello di riferimenti più o meno impliciti alla letteratura inglese, in quella di Bianciardi si coglie come vera e propria presenza di interferenze. In entrambi i casi, questa tendenza è principalmente dovuta all’esistenza di un “io traduttore”, in cui si incontrano l’io dell’autore e l’io del protagonista. Si può affermare, dunque, che l’uso di termini stranieri sia una scelta stilistica consapevole e volontaria dei due scrittori, che tra l’altro erano anche traduttori, proprio come i loro protagonisti.

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Nonostante il multilinguismo faccia parte del patrimonio comune europeo, la diversità linguistica può rappresentare un ostacolo alla comunicazione. Per promuovere l' integrazione e la mobilità all'interno del nostro continente, l'Unione Europea si impegna a finanziare progetti per sviluppare la pratica dell'intercomprensione. Si tratta di programmi che migliorano le capacità ricettive, che consentono la comunicazione tra persone che parlano lingue diverse e che facilitano l'apprendimento linguistico grazie alle somiglianze lessicali e morfosintattiche tra lingue che fanno parte di una stessa famiglia. L'ambito dove più si sono sviluppati questi progetti negli ultimi vent'anni è quello delle lingue romanze. Nella prima parte di questo lavoro, si introdurrà il concetto di intercomprensione e si spiegheranno i suoi obiettivi e i suoi vantaggi. Nella seconda parte, si esamineranno i principali metodi di intercomprensione tra lingue romanze. A causa dello spazio limitato, è stato necessario scegliere solo alcune tipologie di programmi e i loro esempi più rappresentativi: si prenderanno in considerazione solo i progetti che comprendono anche il catalano e si focalizzerà l'attenzione sulle piattaforme digitali, sui programmi per bambini e sui manuali.

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This dissertation is aimed at analysing deeply and thoroughly the most significant topics and features reflected in the Latin American literary work of Alberto Manzi. His almost thirty years of travelling and volunteering in the indigenous communities of South America formed a background of knowledge and experiences, which turned out to be crucial for the genesis of his Latin American trilogy. In the light of this, not only are ‘La luna nelle baracche’, ‘El loco’ and ‘E venne il sabato’ a speaking testimony of Manzi’s life and inner development, but they also offer a privileged perspective on the social, historical and religious situation of the people of Latin America. For a better understanding of the books, chapter one provides an extensive historical and economic commentary stretching over a century, from the collapse of the Spanish Empire to the rise of modern dictatorships in the late ‘70s, and the long democratic transition of the ‘80s. As far as the religious background is concerned, it is important to mention the influence of the liberation theology in the shaping of Manzi’s revolutionary thought. Indeed, chapter two identifies the precursors of the liberation theology, considers the effects of the Second Vatican Council on Latin America’s Catholic Church, and presents the methodology and the most powerful intuitions of the liberation theology. Finally, chapter three employs a critical analysis of Manzi’s Latin American trilogy, which focuses on his personal journal of his time in the austral continent, and Sonia and Giulia Manzi’s testimony published in a book entitled ‘Non è mai troppo tardi’. Chapter three provides an in-depth analysis of the evolution of the author’s revolutionary thought and plot dynamics; it discusses the psychological profile of the characters, the cultural features of the indigenous traditions, and the author’s urge to involve the readership in a permanent process of self-questioning.

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One of the major challenges for a mission to the Jovian system is the radiation tolerance of the spacecraft (S/C) and the payload. Moreover, being able to achieve science observations with high signal to noise ratios (SNR), while passing through the high flux radiation zones, requires additional ingenuity on the part of the instrument provider. Consequently, the radiation mitigation is closely intertwined with the payload, spacecraft and trajectory design, and requires a systems-level approach. This paper presents a design for the Io Volcano Observer (IVO), a Discovery mission concept that makes multiple close encounters with Io while orbiting Jupiter. The mission aims to answer key outstanding questions about Io, especially the nature of its intense active volcanism and the internal processes that drive it. The payload includes narrow-angle and wide-angle cameras (NAC and WAC), dual fluxgate magnetometers (FGM), a thermal mapper (ThM), dual ion and neutral mass spectrometers (INMS), and dual plasma ion analyzers (PIA). The radiation mitigation is implemented by drawing upon experiences from designs and studies for missions such as the Radiation Belt Storm Probes (RBSP) and Jupiter Europa Orbiter (JEO). At the core of the radiation mitigation is IVO's inclined and highly elliptical orbit, which leads to rapid passes through the most intense radiation near Io, minimizing the total ionizing dose (177 krads behind 100 mils of Aluminum with radiation design margin (RDM) of 2 after 7 encounters). The payload and the spacecraft are designed specifically to accommodate the fast flyby velocities (e.g. the spacecraft is radioisotope powered, remaining small and agile without any flexible appendages). The science instruments, which collect the majority of the high-priority data when close to Io and thus near the peak flux, also have to mitigate transient noise in their detectors. The cameras use a combination of shielding and CMOS detectors with extremely fast readout to mi- imize noise. INMS microchannel plate detectors and PIA channel electron multipliers require additional shielding. The FGM is not sensitive to noise induced by energetic particles and the ThM microbolometer detector is nearly insensitive. Detailed SNR calculations are presented. To facilitate targeting agility, all of the spacecraft components are shielded separately since this approach is more mass efficient than using a radiation vault. IVO uses proven radiation-hardened parts (rated at 100 krad behind equivalent shielding of 280 mils of Aluminum with RDM of 2) and is expected to have ample mass margin to increase shielding if needed.

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Io's plasma and neutral tori play significant roles in the Jovian magnetosphere. We present feasibility studies of measuring low-energy energetic neutral atoms (LENAs) generated from the Io tori. We calculate the LENA flux between 10 eV and 3 keV. The energy range includes the corotational plasma flow energy. The expected differential flux at Ganymede distance is typically 10(3)-10(5) cm(-2) s(-1) sr(-1) eV(-1) near the energy of the corotation. It is above the detection level of the planned LENA sensor that is to be flown to the Jupiter system with integration times of 0.01-1 s. The flux has strong asymmetry with respective to the Io phase. The observations will exhibit periodicities, which can be attributed to the Jovian magnetosphere rotation and the rotation of Io around Jupiter. The energy spectra will exhibit dispersion signatures, because of the non-negligible flight time of the LENAs from Io to the satellite. In 2030, the Jupiter exploration mission JUICE will conduct a LENA measurement with a LENA instrument, the Jovian Neutrals Analyzer (JNA). From the LENA observations collected by JNA, we will be able to derive characteristic quantities, such as the density, velocity, velocity distribution function, and composition of plasma-torus particles. We also discuss the possible physics to be explored by JNA in addition to the constraints for operating the sensor and analyzing the obtained dataset. (C) 2015 Elsevier Ltd. All rights reserved.

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Trägerband: Ms. Carm. 20; Vorbesitzer: Karmeliterkloster Frankfurt am Main