1,720,995 research outputs found
Directorivm ivdicvm ecclesiastici fori, in varias bipartitvm resolvtiones ...
No full textSign.: a-b\p8\s, A-P\p8\sTexto con apostillas marginale
Directorium iudicum ecclesiastici fori in varias bipartitum resolutiones
No full textObra perteneciente al Fondo Antiguo de la Biblioteca de la USA
Bighelloni italiani. La deriva urbana nelle pratiche artistiche degli anni Novanta
No full textIn Peripezie del dopoguerra nell’arte italiana, Adachiara Zevi writes about the double nature of the Italian Nineties, divided between the mediatic dematerialization of the artist’s body and its physical presence in a specific place. It is a dichotomy synthesized in the works of some Italian artists that began working in that decade. More or less directly inspired by the Situationist experiences, the Fluxus' practices, and Gordon Matta-Clark's "an-architecture", on the one hand, they focus on peripheral spaces of the globalized society, modified by the contemporary process of Post-Industrialisation, on the other, they show a more general interest in crossing and "re-conquering" urban areas. In both cases, along with the physical presence of the artist, the video and photographic documentation plays a fundamental part and, sometimes, it assumes the function of a work of art. The essay aims to describe the historical and theoretical background of this tendency and to analyze its various artistic manifestations developed between the Nineties and the new millennium: tour guides in peripheral areas organized by Cesare Pietroiusti, Luca Vitone's documentation of his ordinary path, Stalker's exploration of the "actual territories", Cesare Viel's forays in Genoa's harbor, urbanistic investigations led by Gruppo A12, and photographic collages of peripheric areas created by Botto&Bruno. In Peripezie del dopoguerra nell’arte italiana, Adachiara Zevi parla della duplice natura degli anni novanta in Italia, sospesa tra la smaterializzazione mediatica del corpo dell’artista e la sua presenza fisica in uno spazio specifico. Una dicotomia che trova sintesi nei lavori di alcuni artisti italiani che cominciano ad affermarsi proprio a partire da questo decennio. Ispirati più o meno direttamente alle esperienze situazioniste, alle pratiche di Fluxus e all’“anarchitettura” di Gordon Matta-Clark, essi da una parte si concentrano sugli spazi marginali della società globalizzata, modificati dal contemporaneo processo di post-industrializzazione, dall’altra mostrano un interesse più generale nell’attraversamento di territori urbani in ragione di una loro riappropriazione. In entrambi i casi, oltre alla presenza fisica dell’artista, riveste una funzione fondamentale la documentazione video e fotografica, che a volte acquisisce il ruolo di opera a sé stante. Il presente saggio intende descrivere i presupposti storici e teorici di questa tendenza e osservarne le diverse espressioni artistiche sviluppatesi tra gli anni novanta e i primi duemila: le visite guidate da Cesare Pietroiusti in zone periferiche, Luca Vitone e la documentazione di un proprio percorso abituale, l’esplorazione dei “territori attuali” da parte di Stalker, Cesare Viel e le sue incursioni nel porto di Genova, le indagini urbanistiche del Gruppo A12, i collage fotografici di periferie di Botto&Bruno.  
Dissipative systems driven by activated carboxylic acids
Full text linkThis thesis presents the results of my PhD research, which focused on the employment of Activated Carboxylic Acids (ACAs) as chemical fuels to drive the operation of a series of dissipative systems.
This thesis falls within the field of Systems Chemistry, which aims to design complex artificial (de novo) systems of interacting and interconverting molecules and to study the emergent properties deriving from them. In Chapter 1 a general introduction to the field is given, with a particular focus on natural systems and how they managed to inspire the design of artificial life-like ones. The key concepts at the base of the operation of natural systems are discussed, as well as some of the strategies employed so far to design systems that dissipate energy to provide a certain output. Based on their exploited functionality, such systems have been divided into motors, pumps, and self-assemblable molecules. A series of examples for each category is illustrated, drawing the attention on the energy source that drive their operation. Finally, ACA-driven artificial systems are discussed with an initial focus on the state of the art of the ACAs topic. Among all the examples, some artificial life-like systems are highlighted both for the motor and pump, and self-assembly category pointing out their operational mechanisms.
The following Chapters focus on the research I carried out during my PhD. The main goal has been to broaden the applicability of the ACAs both in organic solvents and in water. Chapter 2, carried out in collaboration with Prof. Gianfranco Ercolani, shows the design of two biphenyl amines and how an ACA, namely 2-cyano-2-phenylpropanoic acid, can be used to temporally control the conformational freedom around the CC bond connecting the two aromatic rings. In Chapter 3 is described the first example in which two orthogonal fuels of different nature, i.e. an ACA and light, have been used to drive the translocation of a metal cation between different supramolecular receptors. Interestingly, the combination of the two stimuli guarantees a finer time-control of the translocation process.
Chapter 4 and 5 deal with the use of ACAs to control over time the population of a dynamic library of imines. Firstly, the focus has been placed on the temporal control of the composition of the library in the dissipative state. Then, in collaboration with Prof. Gianfranco Ercolani, the attention was shifted on how the dynamic library can store the energy deriving from the fuel-to-waste conversion and how the energy storage can be modulated by changing solvent.
Finally, Chapter 6 illustrates the results obtained during my six-months stay in Munich hosted by the Boekhoven’s group. In this chapter an ACA, namely nitroacetic acid, has been employed to control the lifetime of coacervate-based droplets in water, providing a robust platform for examining early protocell-like systems
Fare spazio: una strategia di rappresentazione della violenza
No full textIn Tre saggi sull’immagine, Jean-Luc Nancy delinea un’interpretazione della violenza che non si limita a rilevare le sue potenzialità materialmente distruttive, ma ne considera le implicazioni a livello etico ed estetico: secondo il filosofo francese la violenza consiste in un attentato alla capacità rappresentativa della vittima. A seguito dell’atto violento, infatti, quest’ultima diviene incapace di immaginarsi al di là del suo opprimente status di vittima. Dopo aver analizzato l’opera di James Nachtwey, utile a descrivere un approccio vittimario alla violenza, la tesi prosegue prendendo in considerazione artisti che cercano di riattivare un dispositivo di rappresentazione e un meccanismo di immaginazione il più possibile co-autoriali: l’espressione “fare spazio” riassume questa tendenza a costruire uno spazio per le vittime di una violenza e, contemporaneamente, lasciare loro spazio per immaginare e per raggiungere una nuova soggettività. La tesi analizza diverse manifestazioni del “fare spazio”: Teresa Margolles investiga l’autonomia della materia estrapolata dai cadaveri, alcuni artisti contro-monumentali (Jochen e Ester Gerz, Horst Hoheisel e Peter Eisenman) sollecitano la facoltà immaginativa dei loro spettatori in opere pubbliche dedicate alla Shoah, Regina José Galindo basa le proprie performance sulla parziale incorporazione di testimonianze precedentemente raccolte, Milo Rau, nei suoi spettacoli e film, sviluppa un dispositivo di soggettivazione che permetta alle vittime di costruirsi un’identità che vada al di là della propria condizione. Nei lavori di questi artisti la violenza non è contestata sul piano dell’attivismo, della denuncia o della pietà, ma su un piano estetico, che mira a riattivare quella potenza che essa ha soppresso.In Tre saggi sull'immagine, Jean-Luc Nancy gives an interpretation of violence that is not limited to point out its materially destructive potentiality, but that considers its ethical and esthetical implications: according to the French philosopher, violence consists in an attempt on the victim's representative capability. As a consequence of a violent act, indeed, the victim becomes incapable of imagining themself beyond their oppressing status. After analyzing some photographs of James Nachtwey, useful to describe a victimary approach to violence, the dissertation takes into account artists who try to re-activate, in as much as possible co-authorial way, a representation's dispositive and an imagination's mechanism: the expression "make room" resumes this tendency to construct a space for the violence's victims and, at the same time, to let them imagine and reach a new subjectivity. The Ph.d thesis analyzes different ways to "make room": Teresa Margolles tests the autonomy of materials extrapolated from the corpses; some counter-monumental artists (Jochen and Esther Shalev Gerz, Horst Hoheisel, Peter Eisenman) solicit the spectators' imaginative power in public works devoted to Shoah; Regina José Galindo bases her performance on partial incorporation of previously collected testimonials; Milo Rau, in his movies and theatre plays, develops a subjectification's dispositive that let the victims build an identity beyond their condition. These artists' works don't contest the violence on the level of the activism, of the complaint, or the pity, but on an esthetic one, trying to re-generate that power suppressed by the violence itself
Coacervate‐Droplet Cased Synthetic Cells Regulated By Activated Carboxylic Acids (ACAs)
Full text linkRegulating the formation and dissolution of active complex coacervate droplets with chemical reactions offers a powerful synthetic cell model. Such active droplets are also helpful in understanding the non-equilibrium nature of membrane-less organelles. Like many membrane-less organelles, these droplets rely on high-chemical potential reagents, like ATP, to maintain their transient nature. This study explores Activated Carboxylic Acids (ACAs) as a high-chemical potential fuel to modulate the lifetime of peptide-based coacervates through transient pH changes. We demonstrate that nitroacetic acid, a commonly used ACA, can effectively induce the formation and dissolution of coacervates by transiently altering the solution′s pH. The system, comprising the zwitterionic peptide Ac-FRGRGD-OH and polyanions, forms coacervates upon protonation at low pH and dissolves as the pH returns to neutral. Our findings indicate that the lifetime of these synthetic cells can be fine-tuned by varying the amount of ACA added, and the system can be refueled multiple times without significant interference from by-products. This ACA-driven reaction cycle is versatile, accommodating various coacervate compositions and enabling the uptake of diverse compounds, making it a valuable model for compartmentalization. The study underscores the potential of ACA-fueled coacervates as a platform for investigating biomolecular condensates and developing synthetic life systems
Valentini, Matteo
No full textAn angel (or Fame) blowing one trumpet and holding a second stands on an orb.
From: Oddi, Sforza, 1540-1611. Compendiosae substitutiones tractatus. Venetijs : Apud Matthaeum Valentinum, 1597.https://collected.jcu.edu/printers/1027/thumbnail.jp
Molecular entanglement can strongly increase basicity
Full text linkBr & oslash;nsted basicity is a fundamental chemical property featured by several kinds of inorganic and organic compounds. In this Review, we treat a particularly high basicity resulting from the mechanical entanglement involving two or more molecular subunits in catenanes and rotaxanes. Such entanglement allows a number of basic sites to be in close proximity with each other, highly increasing the proton affinity in comparison with the corresponding, non-entangled counterparts up to obtain superbases, properly defined as mechanically interlocked superbases. In the following pages, the development of this kind of superbases will be described with a historical perusal, starting from the initial, serendipitous findings up to the most recent reports where the strong basic property of entangled molecular units is the object of a rational design.Br & oslash;nsted basicity can be greatly enhanced by the mechanical entanglement of two or more interlocked molecular subunits within catenanes and rotaxanes. Here, the authors discuss the development of such mechanically interlocked superbases, and outline challenges and opportunities for future directions of research
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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