1,722,770 research outputs found

    «Il letto geologico della vita». Sulla metafisica della natura di Ernst Jünger

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    This paper seeks to identify the essential features of a metaphysics of nature in the thought of Ernst Jünger. In the first part, the essay examines Jünger's metaphysics of the Worker as elaborated in "Der Arbeiter", demonstrating how the survival of nature is there tied to its subordination to technology. The second and third parts highlight the theoretical development that leads the author to attribute a central role to nature, culminating in the formulation of a genuine metaphysics centered on the transcendence of Earth. The last section of the paper juxtaposes Jünger's reflections with some fundamental issues of geophilosophy, questioning whether Jünger can be considered a geophilosophical thinker

    Tra "Walten-lassen" e "Sein-lassen". Sull'influenza della Vorlesung heideggeriana del 1929-30 sul pensiero dell'Evento

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    The aim of this essay is to highlight the persistent presence of the concepts of “Projection" (Entwurf) and “Letting-prevail” (Walten-lassen) introduced by Heidegger in his 1929-30 university course ("The Fundamental Concepts of Metaphysics. World, Finitude, Solitude") in the works in which the author attempts to think the “Event” issue. The first part of the paper shows how within the same course of 1929-30 there is a paradigm shift on Heidegger’s part in his understanding of the topic of the projection; in the second part an attempt is made to show how the conception of Entwurf and Walten-lassen that he arrives at in the final part of the course are the same one that, although in a different theoretical context, he thematizes in the "Contributions to Philosophy"

    Feltre dopo la morte di Zancanaro

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    Muro della casa di Feltre (Belluno) dove dopo l\u27uccisione di Angelo Zancanaro, medaglia d\u27oro al Valor Militare, il 19 giugno 1944, fu tracciata una scritta patriottica che i tedeschi fecero subito cancellare. Cfr. L. Boschis, Le popolazioni del bellunese nella guerra di liberazione, a cura dell\u27istituto storico bellunese della Resistenza, Feltre, Castaldi, 1986, p.181.1 fotografia in bianco e ner

    Muscle research: A tour d'horizon

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    The Special Issue on the "Muscular Structure, Physiology and Metabolism" was proposed in order to maintain the referenced scientific community abreast with recent research advancements regarding the morphology, functionality, and metabolism of muscle tissue, including a total of eighteen published papers, of which twelve were original research manuscripts and six were review papers [...]

    Adaptive Video Documentaries

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    Although some interesting architectures are emerging to define and formalize the notion of Adaptive Hypermedia, the research in this field is primarily focused on presentations based on static contents, mainly text and images. We propose an initial step toward the adaptative composition of video documentaries, that is video presentations based on still 2D images. Video clips are built by applying cinematic techniques - camera movements and transition effects - to images. The novelty of our approach stems from the application of adaptive hypermedia techniques to the dynamic composition of video documentaries exploiting the basic notions of cinematography, paying particular attention to the choice and the duration of transitions between shots. In this work we introduce XASCRIPT, a flexible mark-up formalism that allows a hypotetical author to define a set of possible video documentaries, from which user-tailored documentaries can be dynamically assembled. The author, via a graphical interface (under development), can describe templates that represent a set of 'potential' video documentaries, with instructions for the selection and the editing of the elements of the video clips. The templates include 'adaptation rules' as multiple-choice points, along which the presentation is tailored to a specific user. The application supports both content adaptation and dynamic selection of transition effects between video shot

    Mass spectrometry pneumatically assisted desorption/ionization in forensic toxicology

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    La spettrometria di massa è una delle tecniche più rilevanti in tossicologia clinica e forense. Il suo sviluppo e il miglioramento si basano sull'invenzione e l'uso di nuove sorgenti di ioni, nuovi metodi di ionizzazione, nuovi analizzatori di massa e nuove tecniche di pre-trattamento dei campioni. Una recente innovazione è la capacità di registrare spettri di massa su campioni reali direttamente nel loro ambiente nativo, senza preparazione del campione o pre-separazione. In questo ambito è stato descritto un nuovo metodo di ionizzazione/desorbimento chiamato DESI (desorbimento Electrospray ionizzazione), in seguito è stato sviluppato un metodo chiamato Dessì (Desorbimento Sonic Spray ionizzazione), a prima vista simile a DESI, ma in fondo sostanzialmente diverso. Questa tesi consiste nello sviluppo di una nuova interfaccia di desorbimento / ionizzazione per indagare il vero meccanismo coinvolto nella formazione di ioni, perché abbiamo ritenuto questo passaggio propedeutico per garantire il successivo uso del metodo in campo tossicologico analitico. Abbiamo verificato che il contributo pneumatico è preponderante per ottenere risultati. Quindi, la nostra nuova interfaccia di desorbimento/ionizzazione utilizza solo uno spray di solvente puro, senza alcuna tensione elettrica applicata allo sprayer. Un aspetto fondamentale di questo progetto, applicato a diverse matrici complesse, è il numero di parametri di funzionamento controllabili che possono essere studiati e ottimizzati per ottenere un'efficace analisi di superficie. Le variabili più importanti prese in considerazione sono state la geometria della sorgente (l'angolo di spray e l'angolo di diffusione di ioni, come pure le varie distanze nell'allineamento dello spray, del campione e dello spettrometro di massa) e la caratteristica dello spray (il contenuto del solvente ed il gas di portata). Tutte le misurazioni sono state eseguite in condizioni di ionizzazione positiva e negativa, variando tensione del capillare, pressione del gas di nebulizzazione, il flusso di gas al capillare e la temperatura del capillare. L'acquisizione è stata prodotta in modalità multiple mass spectra (MSn). Abbiamo applicato questa nuova soluzione tecnica per l'identificazione di composti tal quali, di principi attivi in campioni di farmaci mediante analisi diretta di compresse, principi attivi contenuti in specie vegetali. Gli sviluppi futuri saranno connessi ad applicare l’analisi diretta di analiti presenti sulle superfici originali di interesse nel settore tossicologico per il campionamento in vivo su superfici di tessuti, per individuare l’esposizione a farmaci e xenobiotici, oltre alla possibilità di costruire un’immagine chimica della distribuzione spaziale di analiti sulle superfici dei campioni.Mass spectrometry is one of the most relevant techniques in clinical and forensic toxicology. Its development and improvement are based on the invention and utilization of new ion sources, new ionization methods, new mass analyzers and new sample pre-treatment techniques. A recent innovation is the ability to record mass spectra on ordinary samples in their native environment, without sample preparation or pre-separation. In this field, a new desorption ionization method called DESI (Desorption Electrospray Ionization) has been described; subsequently, method called DeSSI (Desorption Sonic Spray Ionization), at first sight similar to DESI, but in deep substantially different, has been developed. This thesis consist in developing a new desorption/ionization interface to investigate the real mechanism involved in ions formation because we considered that propaedeutic for the extensive use of the method in the toxicological analytical field. We verified that the pneumatic contribution is preponderant to the obtained results. Hence, our new desorption/ionization interface uses only a spray of pure solvent with no high voltage on needle. A key aspect of this project, applied to several complex matrix, is the number of controllable operating parameters that can be investigated and optimized to obtain an efficient surface analysis. The most important variables are taken in consideration were the source geometry (the spray angle and the ion uptake angle, as well as the various distances in aligning the spray, sample and mass spectrometer) and the characteristic of sprayer (contents of the solvent spray and gas flow rate). All measurements have been performed in positive and negative ionization conditions, varying capillary voltage, nebulizing gas pressure, drying gas flow and end plate temperature. Acquisition was in multiple mass spectrometry mode (MSn). 2 We have applied this new technical solution to compound identification, active principles and drugs identification in direct tablet analysis, active principles and drugs identification in vegetable species. Future developments will be related to apply the direct analysis of analytes present on the original surfaces of interest in the toxicological field for in vivo sampling of living tissue surfaces, to identify drug and xenobiotic exposure, besides the chemical imaging of spatial distribution of analytes onto sample surfaces

    Shared Interfaces for Co-located Interaction

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    Co-located, collaborative work around shared surfaces has become a major topic of the research agenda in the fields of teamwork and collaborative learning. In this chapter, we introduce the difference between multi-touch and multi-user interfaces and we present three cases of co-located interactions on shared interfaces. The first two cases present examples of multi-user applications: StoryTable is a multi-user application for children to practise their narration skills in a collaborative way; the NNRT table is a multi-user application to foster a shift in the attitudes of participants via a narration task (it is used in peace-education programs). Finally, we describe a new approach to shared interfaces explicitly aimed at influencing immediate behavior in an informal, non goal-oriented co-located small group
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