8,902 research outputs found
Andrea Bacová
No full textAndrea Bacová focuses on research and teaching in the field of residential architecture. Her work includes systematic research on residential buildings and their urban context. She actively participates in promoting Slovak architecture and is the author of several publications and exhibitions
Characterization of carbonaceous nanoparticle size distributions (1-10 nm) emitted from laboratory flames, diesel engines and gas appliances
No full textCommercially available SMPS and a differential mobility analyser (DMA) designed to enable detection of particles as small as 1 nm were used to provide further information about nanoparticles emitted from premixed flames, engines and common burners, with particular attention to the 1-10 nm range. Premixed laboratory flames were studied to examine carbonaceous nanoparticle formation in fuel rich burning conditions near the onset of soot formation. Nanoparticles were measured at different carbon/oxygen (C/O) ratio and at different heights above the burner surface in order to evaluate their behaviour in high temperature conditions. The measured size distributions showed that the first particles observed in flames have a size of ~2nm (Mode I), consistent with previous in situ measurements by light scattering and extinction (LSE), size distributions determined by Atomic Force Microscopy (AFM) of particles deposited by thermophoresis on mica substrates and off-line size measurements of material captured in water samples from the same flames. A larger 3-7 nm particle mode (Mode II) was measured in richer flames and later in the flame, which was not previously distinguished by optical measurements, which can only give the d6-3 diameter (ratio of the 6th and 3rd moments of the size distribution) or in the size distributions determined by AFM, which had lower resolution. This larger mode is also not observed in water samples collected from flames even when their concentration is as large as or larger than the 2nm mode, presumably because the larger particles are hydrophobic. The evolution of these two nanoparticles modes was studied in a flame with C/O = 0.65 at different height above the burner surface. The results were consistent with the conceptual framework for particle inception, advanced in earlier works based on UV-visible optical measurements, and for particle coagulation which seemed to increase because of the appearance of mode II, in agreement with the size-dependent coagulation rate addressed in previous studies based on optical measurement and atomic force microscopy (AFM).
To begin addressing the question of whether or not such small particles are also found in the exhausts/emissions of applied combustion systems were they may be inhaled by hu-mans or interact with the atmosphere, size distributions of nanoparticles generated by a burner, a test engine and diesel vehicles were measured. The emissions from a test bench single-cylinder engine and from two modern light-duty diesel vehicles run with commercial ultralow sulphur fuel indicated the presence of a “solid” particle nucleation mode (~ 10nm or lower) which accompanied normal soot emissions (~ 60 nm). In diesel vehicle tests, this mode, most prominent at idle, was highly sensitive to the level of exhaust gas recirculation (EGR), non-volatile to temperature higher than 400 C and electrically charged. All of these characteristics suggest that these solid particles were formed during combustion and not by lower temperature condensation processes as the exhaust cools. An important conclusion of these tests was also that the specific diesel particulate filters employed removed the “solid” nucleation mode and the soot with efficiency comparable to soot. Tests on bench single-cylinder engines again indicated that the smallest nanoparticles were highly influenced by the EGR levels but also the type of injections and the type of fuel employed have an effect on the emitted particulate. Preliminary measurements on domestic gas appliances burning methane also showed the presence of nanoparticles in the size range 1-3 nm in the plume near the burner, in agreement with optical absorption measurements and time resolved fluorescence polarization anisotropy (TRFPA) analysis on water samples from the same flames
Viewer-, Author-, and Ownership in the Work of Andrea Zittel
No full textAndrea Zittel invites others to collapse the distinctions between artist, viewer, and collaborator by interacting with her usable works. This thesis explores the process of interacting with Zittel\u27s works, and how it affects viewer-, author- and ownership
The Lettere of Andrea Calmo: authorial artifices and historical reality
No full textopenNonostante l’edizione di Vittorio Rossi del 1888, la raccolta di "ingegnosi cheribizzi" e di "fantastiche fantasie" di Andrea Calmo è ancora avvolta da un certo mistero. L’autore, dissimulando la propria identità dietro alla “maschera” dell’umile pescatore veneziano, è stato in grado di offrire uno spaccato della cultura e della società nella Venezia cinquecentesca.
In particolare, è il quarto libro delle Lettere ad aver suscitato maggiore interesse tra gli studiosi ed i lettori: pubblicato nel 1566, a diversi anni di distanza dai primi tre, questo libro si distingue per il fatto che tutte le epistole sono indirizzate a delle donne immaginarie o realmente esistite.
In questa sede si propone, in primo luogo, uno studio della biografia del Calmo accompagnata da un’analisi del contesto storico-culturale della Venezia cinquecentesca; in secondo luogo, invece, viene proposto un commento di alcune lettere dell’ultimo libro dell’opera calmiana, che cerchi di far luce principalmente sull’aspetto linguistico e contenutistico del testo.Despite Vittorio Rossi's 1888 edition, Andrea Calmo's collection of "ingegnosi cheribizzi" and "fantastiche fantasie" is still shrouded in a certain mystery. The author, dissimulating his own identity behind the "mask" of the humble Venetian fisherman, was able to offer a cross-section of culture and society in sixteenth-century Venice.
In particular, it is the fourth book of the Letters that has aroused greater interest among scholars and readers: published in 1566, several years after the first three, this book stands out for the fact that all the epistles are addressed to women imaginary or actually existed.
Here we propose, first of all, a study of Calmo's biography accompanied by an analysis of the historical-cultural context of sixteenth-century Venice; secondly, however, a commentary on some letters from the last book of Calmo's work is proposed, which seeks to shed light mainly on the linguistic and content aspect of the text
Trusted Tales: Creating Authenticity in Literary Representations from Ex-Yugoslavia
No full textThis research deals with questions of authority and authenticity and how they are expressed, constructed, and appropriated within the Anglophone book market. It considers the body of literature written about ex-Yugoslavia since the 1990s Balkan conflicts by exiled writers from the region which has entered the international literary canon. Books’ routes from original publishers into English translation are discussed through practices of trust, one of the crucial social devices underpinning their exchange. Within these cross-cultural processes, the role of cultural brokers is crucial. Symbolic and cultural resources are specifically mobilised through their powerful author brands.
By exploring authenticity in the context of book publishing, I further look at how ideas and practices of community are employed and negotiated by writers and those who promote their books. My field is multi-sited and fluid, reflecting how different individual and national positions are enacted and performed through strategies ranging from unconscious dispositions to deliberate intentions. This research thus brings together ideas of the author as an authentic, representative voice together with exile as a position that grants them a new lease of relevancy in the post-socialist context.
Although ex-Yugoslav books occupy a ‘high end’ niche of the UK market, constrained by commercial as well as political, cultural, and institutional forces, in public discourse ideas of the ‘free market’ and ‘free speech’ are mobilised to produce various types of modernisation narratives. The (post)socialist production of literature is perceived as having to ‘evolve’ into a capitalist model: this would allow not only healthy competition and consumer choice but guarantee an individual writer ‘free speech’ as a basic human right. Therefore, the most general question this research raises is what kind of foreign literature gets translated into English, under what socio-cultural conditions and which politics of representation it serves within the project of world literature
A-central model for the geometric calibration of hyper-hemispherical lenses
No full textHyper-hemispherical lenses are optical objective lenses with an ultra-wide field of view. Due to their extreme field of view, the geometric calibration introduces several setup difficulties. Various methods have been developed for simplifying the geometric calibration of a camera in the close-range field by defining intrinsic and extrinsic calibration parameters in a limited ambience of a clean room and taking advantage of simple calibration chessboards. A well-known example in this regard is Zhang’s approach for pinhole cameras. A similar approach was pursued by Scaramuzza to model more extensive cameras that include fisheye and panoramic lenses. However, despite this toolbox’s efficiency, it is ineffectual in the case of a hyper-hemispherical lens because of model limitations in the approximation of the corresponding projection system. In this study, we define and validate what we believe to be a novel a-central model extension (AME) for the description of hyper-hemispherical lenses that is able to overcome these limitations and to describe more accurately the physical behavior introduced by the design of these lenses. For this apparently new a-central model, we obtain significantly improved calibration results for one of the cameras designed in our laboratory and planned to become a planetary payload of an ESA mission
Efficient Evaluation of the Frequency-Dependent Impedance Matrix of Full-Package Structure
No full textMs. Courtney Chartier, RWWL AUC, August 2011
No full textThis video is a conversation with Ms. Courtney Chartier. Ms. Chartier talks about her work on the "New Georgia Encyclopedia" and "Online Voter Education Project." Andrea Jackson, AUC Woodruff Library, is the interviewer
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